diff --git a/app/assets/javascripts/wizard-vendor.js b/app/assets/javascripts/wizard-vendor.js
index 1e8eb3fc888..f18af6f63fa 100644
--- a/app/assets/javascripts/wizard-vendor.js
+++ b/app/assets/javascripts/wizard-vendor.js
@@ -2,3 +2,4 @@
 //= require select2.js
 //= require jquery.ui.widget.js
 //= require jquery.fileupload.js
+//= require sweetalert.min.js
diff --git a/app/assets/javascripts/wizard/components/invite-list.js.es6 b/app/assets/javascripts/wizard/components/invite-list.js.es6
index 2083c41db77..daa9ee61ac3 100644
--- a/app/assets/javascripts/wizard/components/invite-list.js.es6
+++ b/app/assets/javascripts/wizard/components/invite-list.js.es6
@@ -26,7 +26,10 @@ export default Ember.Component.extend({
   },
 
   updateField() {
-    this.set('field.value', JSON.stringify(this.get('users')));
+    const users = this.get('users');
+
+    this.set('field.value', JSON.stringify(users));
+    this.set('field.warning', users.length ? null : 'invites.none_added');
   },
 
   actions: {
diff --git a/app/assets/javascripts/wizard/components/wizard-step.js.es6 b/app/assets/javascripts/wizard/components/wizard-step.js.es6
index c9bd8e02c68..34e1b8fc0a8 100644
--- a/app/assets/javascripts/wizard/components/wizard-step.js.es6
+++ b/app/assets/javascripts/wizard/components/wizard-step.js.es6
@@ -11,6 +11,8 @@ jQuery.fn.wiggle = function (times, duration) {
   return this;
 };
 
+const alreadyWarned = {};
+
 export default Ember.Component.extend({
   classNames: ['wizard-step'],
   saving: null,
@@ -66,6 +68,14 @@ export default Ember.Component.extend({
     Ember.run.scheduleOnce('afterRender', () => $('.invalid input[type=text]').wiggle(2, 100));
   },
 
+  advance() {
+    this.set('saving', true);
+    this.get('step').save()
+      .then(response => this.sendAction('goNext', response))
+      .catch(() => this.animateInvalidFields())
+      .finally(() => this.set('saving', false));
+  },
+
   actions: {
     quit() {
       document.location = "/";
@@ -80,14 +90,29 @@ export default Ember.Component.extend({
       if (this.get('saving')) { return; }
 
       const step = this.get('step');
-      step.checkFields();
+      const result = step.validate();
+
+      if (result.warnings.length) {
+        const unwarned = result.warnings.filter(w => !alreadyWarned[w]);
+        if (unwarned.length) {
+          unwarned.forEach(w => alreadyWarned[w] = true);
+          return window.swal({
+            customClass: 'wizard-warning',
+            title: "",
+            text: unwarned.map(w => I18n.t(`wizard.${w}`)).join("\n"),
+            type: 'warning',
+            showCancelButton: true,
+            confirmButtonColor: "#6699ff"
+          }, confirmed => {
+            if (confirmed) {
+              this.advance();
+            }
+          });
+        }
+      }
 
       if (step.get('valid')) {
-        this.set('saving', true);
-        step.save()
-          .then(response => this.sendAction('goNext', response))
-          .catch(() => this.animateInvalidFields()) 
-          .finally(() => this.set('saving', false));
+        this.advance();
       } else {
         this.animateInvalidFields();
         this.autoFocus();
diff --git a/app/assets/javascripts/wizard/models/step.js.es6 b/app/assets/javascripts/wizard/models/step.js.es6
index a2ba11408e5..2d6e9b3532b 100644
--- a/app/assets/javascripts/wizard/models/step.js.es6
+++ b/app/assets/javascripts/wizard/models/step.js.es6
@@ -15,14 +15,21 @@ export default Ember.Object.extend(ValidState, {
     return lookup;
   },
 
-  checkFields() {
+  validate() {
     let allValid = true;
+    const result = { warnings: [] };
+
     this.get('fields').forEach(field => {
-      field.check();
-      allValid = allValid && field.get('valid');
+      allValid = allValid && field.check();
+      const warning = field.get('warning');
+      if (warning) {
+        result.warnings.push(warning);
+      }
     });
 
     this.setValid(allValid);
+
+    return result;
   },
 
   fieldError(id, description) {
diff --git a/app/assets/javascripts/wizard/models/wizard-field.js.es6 b/app/assets/javascripts/wizard/models/wizard-field.js.es6
index 80c5d5e575d..2d96d88d3ea 100644
--- a/app/assets/javascripts/wizard/models/wizard-field.js.es6
+++ b/app/assets/javascripts/wizard/models/wizard-field.js.es6
@@ -5,13 +5,19 @@ export default Ember.Object.extend(ValidState, {
   type: null,
   value: null,
   required: null,
+  warning: null,
 
   check() {
     if (!this.get('required')) {
-      return this.setValid(true);
+      this.setValid(true);
+      return true;
     }
 
     const val = this.get('value');
-    this.setValid(val && val.length > 0);
+    const valid = val && val.length > 0;
+
+    this.setValid(valid);
+    return valid;
   }
+
 });
diff --git a/app/assets/javascripts/wizard/test/components/invite-list-test.js.es6 b/app/assets/javascripts/wizard/test/components/invite-list-test.js.es6
index 3e8e0e4ea95..87f6447aa92 100644
--- a/app/assets/javascripts/wizard/test/components/invite-list-test.js.es6
+++ b/app/assets/javascripts/wizard/test/components/invite-list-test.js.es6
@@ -16,6 +16,8 @@ componentTest('can add users', {
     const firstVal = JSON.parse(this.get('field.value'));
     assert.equal(firstVal.length, 0, 'empty JSON at first');
 
+    assert.ok(this.get('field.warning'), 'it has a warning since no users were added');
+
     click('.add-user');
     andThen(() => {
       assert.ok(this.$('.users-list .invite-list-user').length === 0, "doesn't add a blank user");
@@ -33,6 +35,7 @@ componentTest('can add users', {
       assert.equal(val.length, 1);
       assert.equal(val[0].email, 'eviltrout@example.com', 'adds the email to the JSON');
       assert.ok(val[0].role.length, 'adds the role to the JSON');
+      assert.ok(!this.get('field.warning'), 'no warning once the user is added');
     });
 
     fillIn('.invite-email', 'eviltrout@example.com');
diff --git a/app/assets/javascripts/wizard/test/models/wizard-field-test.js.es6 b/app/assets/javascripts/wizard/test/models/wizard-field-test.js.es6
index 45c54989fae..91b91880dc4 100644
--- a/app/assets/javascripts/wizard/test/models/wizard-field-test.js.es6
+++ b/app/assets/javascripts/wizard/test/models/wizard-field-test.js.es6
@@ -26,9 +26,9 @@ test('text - required - validation', assert => {
 });
 
 test('text - optional - validation', assert => {
-  const w = WizardField.create({ type: 'text' });
-  assert.ok(w.get('unchecked'));
+  const f = WizardField.create({ type: 'text' });
+  assert.ok(f.get('unchecked'));
 
-  w.check();
-  assert.ok(w.get('valid'));
+  f.check();
+  assert.ok(f.get('valid'));
 });
diff --git a/app/assets/stylesheets/vendor/sweetalert.css b/app/assets/stylesheets/vendor/sweetalert.css
new file mode 100755
index 00000000000..923b009c70c
--- /dev/null
+++ b/app/assets/stylesheets/vendor/sweetalert.css
@@ -0,0 +1,931 @@
+body.stop-scrolling {
+  height: 100%;
+  overflow: hidden; }
+
+.sweet-overlay {
+  background-color: black;
+  /* IE8 */
+  -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=40)";
+  /* IE8 */
+  background-color: rgba(0, 0, 0, 0.4);
+  position: fixed;
+  left: 0;
+  right: 0;
+  top: 0;
+  bottom: 0;
+  display: none;
+  z-index: 10000; }
+
+.sweet-alert {
+  background-color: white;
+  width: 478px;
+  padding: 17px;
+  border-radius: 5px;
+  text-align: center;
+  position: fixed;
+  left: 50%;
+  top: 50%;
+  margin-left: -256px;
+  margin-top: -200px;
+  overflow: hidden;
+  display: none;
+  z-index: 99999; }
+  @media all and (max-width: 540px) {
+    .sweet-alert {
+      width: auto;
+      margin-left: 0;
+      margin-right: 0;
+      left: 15px;
+      right: 15px; } }
+  .sweet-alert h2 {
+    color: #575757;
+    font-size: 30px;
+    text-align: center;
+    font-weight: 600;
+    text-transform: none;
+    position: relative;
+    margin: 25px 0;
+    padding: 0;
+    line-height: 40px;
+    display: block; }
+  .sweet-alert p {
+    color: #797979;
+    font-size: 16px;
+    text-align: center;
+    font-weight: 300;
+    position: relative;
+    text-align: inherit;
+    float: none;
+    margin: 0;
+    padding: 0;
+    line-height: normal; }
+  .sweet-alert fieldset {
+    border: none;
+    position: relative; }
+  .sweet-alert .sa-error-container {
+    background-color: #f1f1f1;
+    margin-left: -17px;
+    margin-right: -17px;
+    overflow: hidden;
+    padding: 0 10px;
+    max-height: 0;
+    webkit-transition: padding 0.15s, max-height 0.15s;
+    transition: padding 0.15s, max-height 0.15s; }
+    .sweet-alert .sa-error-container.show {
+      padding: 10px 0;
+      max-height: 100px;
+      webkit-transition: padding 0.2s, max-height 0.2s;
+      transition: padding 0.25s, max-height 0.25s; }
+    .sweet-alert .sa-error-container .icon {
+      display: inline-block;
+      width: 24px;
+      height: 24px;
+      border-radius: 50%;
+      background-color: #ea7d7d;
+      color: white;
+      line-height: 24px;
+      text-align: center;
+      margin-right: 3px; }
+    .sweet-alert .sa-error-container p {
+      display: inline-block; }
+  .sweet-alert .sa-input-error {
+    position: absolute;
+    top: 29px;
+    right: 26px;
+    width: 20px;
+    height: 20px;
+    opacity: 0;
+    -webkit-transform: scale(0.5);
+    transform: scale(0.5);
+    -webkit-transform-origin: 50% 50%;
+    transform-origin: 50% 50%;
+    -webkit-transition: all 0.1s;
+    transition: all 0.1s; }
+    .sweet-alert .sa-input-error::before, .sweet-alert .sa-input-error::after {
+      content: "";
+      width: 20px;
+      height: 6px;
+      background-color: #f06e57;
+      border-radius: 3px;
+      position: absolute;
+      top: 50%;
+      margin-top: -4px;
+      left: 50%;
+      margin-left: -9px; }
+    .sweet-alert .sa-input-error::before {
+      -webkit-transform: rotate(-45deg);
+      transform: rotate(-45deg); }
+    .sweet-alert .sa-input-error::after {
+      -webkit-transform: rotate(45deg);
+      transform: rotate(45deg); }
+    .sweet-alert .sa-input-error.show {
+      opacity: 1;
+      -webkit-transform: scale(1);
+      transform: scale(1); }
+  .sweet-alert input {
+    width: 100%;
+    box-sizing: border-box;
+    border-radius: 3px;
+    border: 1px solid #d7d7d7;
+    height: 43px;
+    margin-top: 10px;
+    margin-bottom: 17px;
+    font-size: 18px;
+    box-shadow: inset 0px 1px 1px rgba(0, 0, 0, 0.06);
+    padding: 0 12px;
+    display: none;
+    -webkit-transition: all 0.3s;
+    transition: all 0.3s; }
+    .sweet-alert input:focus {
+      outline: none;
+      box-shadow: 0px 0px 3px #c4e6f5;
+      border: 1px solid #b4dbed; }
+      .sweet-alert input:focus::-moz-placeholder {
+        transition: opacity 0.3s 0.03s ease;
+        opacity: 0.5; }
+      .sweet-alert input:focus:-ms-input-placeholder {
+        transition: opacity 0.3s 0.03s ease;
+        opacity: 0.5; }
+      .sweet-alert input:focus::-webkit-input-placeholder {
+        transition: opacity 0.3s 0.03s ease;
+        opacity: 0.5; }
+    .sweet-alert input::-moz-placeholder {
+      color: #bdbdbd; }
+    .sweet-alert input:-ms-input-placeholder {
+      color: #bdbdbd; }
+    .sweet-alert input::-webkit-input-placeholder {
+      color: #bdbdbd; }
+  .sweet-alert.show-input input {
+    display: block; }
+  .sweet-alert .sa-confirm-button-container {
+    display: inline-block;
+    position: relative; }
+  .sweet-alert .la-ball-fall {
+    position: absolute;
+    left: 50%;
+    top: 50%;
+    margin-left: -27px;
+    margin-top: 4px;
+    opacity: 0;
+    visibility: hidden; }
+  .sweet-alert button {
+    background-color: #8CD4F5;
+    color: white;
+    border: none;
+    box-shadow: none;
+    font-size: 17px;
+    font-weight: 500;
+    -webkit-border-radius: 4px;
+    border-radius: 5px;
+    padding: 10px 32px;
+    margin: 26px 5px 0 5px;
+    cursor: pointer; }
+    .sweet-alert button:focus {
+      outline: none;
+      box-shadow: 0 0 2px rgba(128, 179, 235, 0.5), inset 0 0 0 1px rgba(0, 0, 0, 0.05); }
+    .sweet-alert button:hover {
+      background-color: #7ecff4; }
+    .sweet-alert button:active {
+      background-color: #5dc2f1; }
+    .sweet-alert button.cancel {
+      background-color: #C1C1C1; }
+      .sweet-alert button.cancel:hover {
+        background-color: #b9b9b9; }
+      .sweet-alert button.cancel:active {
+        background-color: #a8a8a8; }
+      .sweet-alert button.cancel:focus {
+        box-shadow: rgba(197, 205, 211, 0.8) 0px 0px 2px, rgba(0, 0, 0, 0.0470588) 0px 0px 0px 1px inset !important; }
+    .sweet-alert button[disabled] {
+      opacity: .6;
+      cursor: default; }
+    .sweet-alert button.confirm[disabled] {
+      color: transparent; }
+      .sweet-alert button.confirm[disabled] ~ .la-ball-fall {
+        opacity: 1;
+        visibility: visible;
+        transition-delay: 0s; }
+    .sweet-alert button::-moz-focus-inner {
+      border: 0; }
+  .sweet-alert[data-has-cancel-button=false] button {
+    box-shadow: none !important; }
+  .sweet-alert[data-has-confirm-button=false][data-has-cancel-button=false] {
+    padding-bottom: 40px; }
+  .sweet-alert .sa-icon {
+    width: 80px;
+    height: 80px;
+    border: 4px solid gray;
+    -webkit-border-radius: 40px;
+    border-radius: 40px;
+    border-radius: 50%;
+    margin: 20px auto;
+    padding: 0;
+    position: relative;
+    box-sizing: content-box; }
+    .sweet-alert .sa-icon.sa-error {
+      border-color: #F27474; }
+      .sweet-alert .sa-icon.sa-error .sa-x-mark {
+        position: relative;
+        display: block; }
+      .sweet-alert .sa-icon.sa-error .sa-line {
+        position: absolute;
+        height: 5px;
+        width: 47px;
+        background-color: #F27474;
+        display: block;
+        top: 37px;
+        border-radius: 2px; }
+        .sweet-alert .sa-icon.sa-error .sa-line.sa-left {
+          -webkit-transform: rotate(45deg);
+          transform: rotate(45deg);
+          left: 17px; }
+        .sweet-alert .sa-icon.sa-error .sa-line.sa-right {
+          -webkit-transform: rotate(-45deg);
+          transform: rotate(-45deg);
+          right: 16px; }
+    .sweet-alert .sa-icon.sa-warning {
+      border-color: #F8BB86; }
+      .sweet-alert .sa-icon.sa-warning .sa-body {
+        position: absolute;
+        width: 5px;
+        height: 47px;
+        left: 50%;
+        top: 10px;
+        -webkit-border-radius: 2px;
+        border-radius: 2px;
+        margin-left: -2px;
+        background-color: #F8BB86; }
+      .sweet-alert .sa-icon.sa-warning .sa-dot {
+        position: absolute;
+        width: 7px;
+        height: 7px;
+        -webkit-border-radius: 50%;
+        border-radius: 50%;
+        margin-left: -3px;
+        left: 50%;
+        bottom: 10px;
+        background-color: #F8BB86; }
+    .sweet-alert .sa-icon.sa-info {
+      border-color: #C9DAE1; }
+      .sweet-alert .sa-icon.sa-info::before {
+        content: "";
+        position: absolute;
+        width: 5px;
+        height: 29px;
+        left: 50%;
+        bottom: 17px;
+        border-radius: 2px;
+        margin-left: -2px;
+        background-color: #C9DAE1; }
+      .sweet-alert .sa-icon.sa-info::after {
+        content: "";
+        position: absolute;
+        width: 7px;
+        height: 7px;
+        border-radius: 50%;
+        margin-left: -3px;
+        top: 19px;
+        background-color: #C9DAE1; }
+    .sweet-alert .sa-icon.sa-success {
+      border-color: #A5DC86; }
+      .sweet-alert .sa-icon.sa-success::before, .sweet-alert .sa-icon.sa-success::after {
+        content: '';
+        -webkit-border-radius: 40px;
+        border-radius: 40px;
+        border-radius: 50%;
+        position: absolute;
+        width: 60px;
+        height: 120px;
+        background: white;
+        -webkit-transform: rotate(45deg);
+        transform: rotate(45deg); }
+      .sweet-alert .sa-icon.sa-success::before {
+        -webkit-border-radius: 120px 0 0 120px;
+        border-radius: 120px 0 0 120px;
+        top: -7px;
+        left: -33px;
+        -webkit-transform: rotate(-45deg);
+        transform: rotate(-45deg);
+        -webkit-transform-origin: 60px 60px;
+        transform-origin: 60px 60px; }
+      .sweet-alert .sa-icon.sa-success::after {
+        -webkit-border-radius: 0 120px 120px 0;
+        border-radius: 0 120px 120px 0;
+        top: -11px;
+        left: 30px;
+        -webkit-transform: rotate(-45deg);
+        transform: rotate(-45deg);
+        -webkit-transform-origin: 0px 60px;
+        transform-origin: 0px 60px; }
+      .sweet-alert .sa-icon.sa-success .sa-placeholder {
+        width: 80px;
+        height: 80px;
+        border: 4px solid rgba(165, 220, 134, 0.2);
+        -webkit-border-radius: 40px;
+        border-radius: 40px;
+        border-radius: 50%;
+        box-sizing: content-box;
+        position: absolute;
+        left: -4px;
+        top: -4px;
+        z-index: 2; }
+      .sweet-alert .sa-icon.sa-success .sa-fix {
+        width: 5px;
+        height: 90px;
+        background-color: white;
+        position: absolute;
+        left: 28px;
+        top: 8px;
+        z-index: 1;
+        -webkit-transform: rotate(-45deg);
+        transform: rotate(-45deg); }
+      .sweet-alert .sa-icon.sa-success .sa-line {
+        height: 5px;
+        background-color: #A5DC86;
+        display: block;
+        border-radius: 2px;
+        position: absolute;
+        z-index: 2; }
+        .sweet-alert .sa-icon.sa-success .sa-line.sa-tip {
+          width: 25px;
+          left: 14px;
+          top: 46px;
+          -webkit-transform: rotate(45deg);
+          transform: rotate(45deg); }
+        .sweet-alert .sa-icon.sa-success .sa-line.sa-long {
+          width: 47px;
+          right: 8px;
+          top: 38px;
+          -webkit-transform: rotate(-45deg);
+          transform: rotate(-45deg); }
+    .sweet-alert .sa-icon.sa-custom {
+      background-size: contain;
+      border-radius: 0;
+      border: none;
+      background-position: center center;
+      background-repeat: no-repeat; }
+
+/*
+ * Animations
+ */
+@-webkit-keyframes showSweetAlert {
+  0% {
+    transform: scale(0.7);
+    -webkit-transform: scale(0.7); }
+  45% {
+    transform: scale(1.05);
+    -webkit-transform: scale(1.05); }
+  80% {
+    transform: scale(0.95);
+    -webkit-transform: scale(0.95); }
+  100% {
+    transform: scale(1);
+    -webkit-transform: scale(1); } }
+
+@keyframes showSweetAlert {
+  0% {
+    transform: scale(0.7);
+    -webkit-transform: scale(0.7); }
+  45% {
+    transform: scale(1.05);
+    -webkit-transform: scale(1.05); }
+  80% {
+    transform: scale(0.95);
+    -webkit-transform: scale(0.95); }
+  100% {
+    transform: scale(1);
+    -webkit-transform: scale(1); } }
+
+@-webkit-keyframes hideSweetAlert {
+  0% {
+    transform: scale(1);
+    -webkit-transform: scale(1); }
+  100% {
+    transform: scale(0.5);
+    -webkit-transform: scale(0.5); } }
+
+@keyframes hideSweetAlert {
+  0% {
+    transform: scale(1);
+    -webkit-transform: scale(1); }
+  100% {
+    transform: scale(0.5);
+    -webkit-transform: scale(0.5); } }
+
+@-webkit-keyframes slideFromTop {
+  0% {
+    top: 0%; }
+  100% {
+    top: 50%; } }
+
+@keyframes slideFromTop {
+  0% {
+    top: 0%; }
+  100% {
+    top: 50%; } }
+
+@-webkit-keyframes slideToTop {
+  0% {
+    top: 50%; }
+  100% {
+    top: 0%; } }
+
+@keyframes slideToTop {
+  0% {
+    top: 50%; }
+  100% {
+    top: 0%; } }
+
+@-webkit-keyframes slideFromBottom {
+  0% {
+    top: 70%; }
+  100% {
+    top: 50%; } }
+
+@keyframes slideFromBottom {
+  0% {
+    top: 70%; }
+  100% {
+    top: 50%; } }
+
+@-webkit-keyframes slideToBottom {
+  0% {
+    top: 50%; }
+  100% {
+    top: 70%; } }
+
+@keyframes slideToBottom {
+  0% {
+    top: 50%; }
+  100% {
+    top: 70%; } }
+
+.showSweetAlert[data-animation=pop] {
+  -webkit-animation: showSweetAlert 0.3s;
+  animation: showSweetAlert 0.3s; }
+
+.showSweetAlert[data-animation=none] {
+  -webkit-animation: none;
+  animation: none; }
+
+.showSweetAlert[data-animation=slide-from-top] {
+  -webkit-animation: slideFromTop 0.3s;
+  animation: slideFromTop 0.3s; }
+
+.showSweetAlert[data-animation=slide-from-bottom] {
+  -webkit-animation: slideFromBottom 0.3s;
+  animation: slideFromBottom 0.3s; }
+
+.hideSweetAlert[data-animation=pop] {
+  -webkit-animation: hideSweetAlert 0.2s;
+  animation: hideSweetAlert 0.2s; }
+
+.hideSweetAlert[data-animation=none] {
+  -webkit-animation: none;
+  animation: none; }
+
+.hideSweetAlert[data-animation=slide-from-top] {
+  -webkit-animation: slideToTop 0.4s;
+  animation: slideToTop 0.4s; }
+
+.hideSweetAlert[data-animation=slide-from-bottom] {
+  -webkit-animation: slideToBottom 0.3s;
+  animation: slideToBottom 0.3s; }
+
+@-webkit-keyframes animateSuccessTip {
+  0% {
+    width: 0;
+    left: 1px;
+    top: 19px; }
+  54% {
+    width: 0;
+    left: 1px;
+    top: 19px; }
+  70% {
+    width: 50px;
+    left: -8px;
+    top: 37px; }
+  84% {
+    width: 17px;
+    left: 21px;
+    top: 48px; }
+  100% {
+    width: 25px;
+    left: 14px;
+    top: 45px; } }
+
+@keyframes animateSuccessTip {
+  0% {
+    width: 0;
+    left: 1px;
+    top: 19px; }
+  54% {
+    width: 0;
+    left: 1px;
+    top: 19px; }
+  70% {
+    width: 50px;
+    left: -8px;
+    top: 37px; }
+  84% {
+    width: 17px;
+    left: 21px;
+    top: 48px; }
+  100% {
+    width: 25px;
+    left: 14px;
+    top: 45px; } }
+
+@-webkit-keyframes animateSuccessLong {
+  0% {
+    width: 0;
+    right: 46px;
+    top: 54px; }
+  65% {
+    width: 0;
+    right: 46px;
+    top: 54px; }
+  84% {
+    width: 55px;
+    right: 0px;
+    top: 35px; }
+  100% {
+    width: 47px;
+    right: 8px;
+    top: 38px; } }
+
+@keyframes animateSuccessLong {
+  0% {
+    width: 0;
+    right: 46px;
+    top: 54px; }
+  65% {
+    width: 0;
+    right: 46px;
+    top: 54px; }
+  84% {
+    width: 55px;
+    right: 0px;
+    top: 35px; }
+  100% {
+    width: 47px;
+    right: 8px;
+    top: 38px; } }
+
+@-webkit-keyframes rotatePlaceholder {
+  0% {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg); }
+  5% {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg); }
+  12% {
+    transform: rotate(-405deg);
+    -webkit-transform: rotate(-405deg); }
+  100% {
+    transform: rotate(-405deg);
+    -webkit-transform: rotate(-405deg); } }
+
+@keyframes rotatePlaceholder {
+  0% {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg); }
+  5% {
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg); }
+  12% {
+    transform: rotate(-405deg);
+    -webkit-transform: rotate(-405deg); }
+  100% {
+    transform: rotate(-405deg);
+    -webkit-transform: rotate(-405deg); } }
+
+.animateSuccessTip {
+  -webkit-animation: animateSuccessTip 0.75s;
+  animation: animateSuccessTip 0.75s; }
+
+.animateSuccessLong {
+  -webkit-animation: animateSuccessLong 0.75s;
+  animation: animateSuccessLong 0.75s; }
+
+.sa-icon.sa-success.animate::after {
+  -webkit-animation: rotatePlaceholder 4.25s ease-in;
+  animation: rotatePlaceholder 4.25s ease-in; }
+
+@-webkit-keyframes animateErrorIcon {
+  0% {
+    transform: rotateX(100deg);
+    -webkit-transform: rotateX(100deg);
+    opacity: 0; }
+  100% {
+    transform: rotateX(0deg);
+    -webkit-transform: rotateX(0deg);
+    opacity: 1; } }
+
+@keyframes animateErrorIcon {
+  0% {
+    transform: rotateX(100deg);
+    -webkit-transform: rotateX(100deg);
+    opacity: 0; }
+  100% {
+    transform: rotateX(0deg);
+    -webkit-transform: rotateX(0deg);
+    opacity: 1; } }
+
+.animateErrorIcon {
+  -webkit-animation: animateErrorIcon 0.5s;
+  animation: animateErrorIcon 0.5s; }
+
+@-webkit-keyframes animateXMark {
+  0% {
+    transform: scale(0.4);
+    -webkit-transform: scale(0.4);
+    margin-top: 26px;
+    opacity: 0; }
+  50% {
+    transform: scale(0.4);
+    -webkit-transform: scale(0.4);
+    margin-top: 26px;
+    opacity: 0; }
+  80% {
+    transform: scale(1.15);
+    -webkit-transform: scale(1.15);
+    margin-top: -6px; }
+  100% {
+    transform: scale(1);
+    -webkit-transform: scale(1);
+    margin-top: 0;
+    opacity: 1; } }
+
+@keyframes animateXMark {
+  0% {
+    transform: scale(0.4);
+    -webkit-transform: scale(0.4);
+    margin-top: 26px;
+    opacity: 0; }
+  50% {
+    transform: scale(0.4);
+    -webkit-transform: scale(0.4);
+    margin-top: 26px;
+    opacity: 0; }
+  80% {
+    transform: scale(1.15);
+    -webkit-transform: scale(1.15);
+    margin-top: -6px; }
+  100% {
+    transform: scale(1);
+    -webkit-transform: scale(1);
+    margin-top: 0;
+    opacity: 1; } }
+
+.animateXMark {
+  -webkit-animation: animateXMark 0.5s;
+  animation: animateXMark 0.5s; }
+
+@-webkit-keyframes pulseWarning {
+  0% {
+    border-color: #F8D486; }
+  100% {
+    border-color: #F8BB86; } }
+
+@keyframes pulseWarning {
+  0% {
+    border-color: #F8D486; }
+  100% {
+    border-color: #F8BB86; } }
+
+.pulseWarning {
+  -webkit-animation: pulseWarning 0.75s infinite alternate;
+  animation: pulseWarning 0.75s infinite alternate; }
+
+@-webkit-keyframes pulseWarningIns {
+  0% {
+    background-color: #F8D486; }
+  100% {
+    background-color: #F8BB86; } }
+
+@keyframes pulseWarningIns {
+  0% {
+    background-color: #F8D486; }
+  100% {
+    background-color: #F8BB86; } }
+
+.pulseWarningIns {
+  -webkit-animation: pulseWarningIns 0.75s infinite alternate;
+  animation: pulseWarningIns 0.75s infinite alternate; }
+
+@-webkit-keyframes rotate-loading {
+  0% {
+    transform: rotate(0deg); }
+  100% {
+    transform: rotate(360deg); } }
+
+@keyframes rotate-loading {
+  0% {
+    transform: rotate(0deg); }
+  100% {
+    transform: rotate(360deg); } }
+
+/* Internet Explorer 9 has some special quirks that are fixed here */
+/* The icons are not animated. */
+/* This file is automatically merged into sweet-alert.min.js through Gulp */
+/* Error icon */
+.sweet-alert .sa-icon.sa-error .sa-line.sa-left {
+  -ms-transform: rotate(45deg) \9; }
+
+.sweet-alert .sa-icon.sa-error .sa-line.sa-right {
+  -ms-transform: rotate(-45deg) \9; }
+
+/* Success icon */
+.sweet-alert .sa-icon.sa-success {
+  border-color: transparent\9; }
+
+.sweet-alert .sa-icon.sa-success .sa-line.sa-tip {
+  -ms-transform: rotate(45deg) \9; }
+
+.sweet-alert .sa-icon.sa-success .sa-line.sa-long {
+  -ms-transform: rotate(-45deg) \9; }
+
+/*!
+ * Load Awesome v1.1.0 (http://github.danielcardoso.net/load-awesome/)
+ * Copyright 2015 Daniel Cardoso <@DanielCardoso>
+ * Licensed under MIT
+ */
+.la-ball-fall,
+.la-ball-fall > div {
+  position: relative;
+  -webkit-box-sizing: border-box;
+  -moz-box-sizing: border-box;
+  box-sizing: border-box; }
+
+.la-ball-fall {
+  display: block;
+  font-size: 0;
+  color: #fff; }
+
+.la-ball-fall.la-dark {
+  color: #333; }
+
+.la-ball-fall > div {
+  display: inline-block;
+  float: none;
+  background-color: currentColor;
+  border: 0 solid currentColor; }
+
+.la-ball-fall {
+  width: 54px;
+  height: 18px; }
+
+.la-ball-fall > div {
+  width: 10px;
+  height: 10px;
+  margin: 4px;
+  border-radius: 100%;
+  opacity: 0;
+  -webkit-animation: ball-fall 1s ease-in-out infinite;
+  -moz-animation: ball-fall 1s ease-in-out infinite;
+  -o-animation: ball-fall 1s ease-in-out infinite;
+  animation: ball-fall 1s ease-in-out infinite; }
+
+.la-ball-fall > div:nth-child(1) {
+  -webkit-animation-delay: -200ms;
+  -moz-animation-delay: -200ms;
+  -o-animation-delay: -200ms;
+  animation-delay: -200ms; }
+
+.la-ball-fall > div:nth-child(2) {
+  -webkit-animation-delay: -100ms;
+  -moz-animation-delay: -100ms;
+  -o-animation-delay: -100ms;
+  animation-delay: -100ms; }
+
+.la-ball-fall > div:nth-child(3) {
+  -webkit-animation-delay: 0ms;
+  -moz-animation-delay: 0ms;
+  -o-animation-delay: 0ms;
+  animation-delay: 0ms; }
+
+.la-ball-fall.la-sm {
+  width: 26px;
+  height: 8px; }
+
+.la-ball-fall.la-sm > div {
+  width: 4px;
+  height: 4px;
+  margin: 2px; }
+
+.la-ball-fall.la-2x {
+  width: 108px;
+  height: 36px; }
+
+.la-ball-fall.la-2x > div {
+  width: 20px;
+  height: 20px;
+  margin: 8px; }
+
+.la-ball-fall.la-3x {
+  width: 162px;
+  height: 54px; }
+
+.la-ball-fall.la-3x > div {
+  width: 30px;
+  height: 30px;
+  margin: 12px; }
+
+/*
+ * Animation
+ */
+@-webkit-keyframes ball-fall {
+  0% {
+    opacity: 0;
+    -webkit-transform: translateY(-145%);
+    transform: translateY(-145%); }
+  10% {
+    opacity: .5; }
+  20% {
+    opacity: 1;
+    -webkit-transform: translateY(0);
+    transform: translateY(0); }
+  80% {
+    opacity: 1;
+    -webkit-transform: translateY(0);
+    transform: translateY(0); }
+  90% {
+    opacity: .5; }
+  100% {
+    opacity: 0;
+    -webkit-transform: translateY(145%);
+    transform: translateY(145%); } }
+
+@-moz-keyframes ball-fall {
+  0% {
+    opacity: 0;
+    -moz-transform: translateY(-145%);
+    transform: translateY(-145%); }
+  10% {
+    opacity: .5; }
+  20% {
+    opacity: 1;
+    -moz-transform: translateY(0);
+    transform: translateY(0); }
+  80% {
+    opacity: 1;
+    -moz-transform: translateY(0);
+    transform: translateY(0); }
+  90% {
+    opacity: .5; }
+  100% {
+    opacity: 0;
+    -moz-transform: translateY(145%);
+    transform: translateY(145%); } }
+
+@-o-keyframes ball-fall {
+  0% {
+    opacity: 0;
+    -o-transform: translateY(-145%);
+    transform: translateY(-145%); }
+  10% {
+    opacity: .5; }
+  20% {
+    opacity: 1;
+    -o-transform: translateY(0);
+    transform: translateY(0); }
+  80% {
+    opacity: 1;
+    -o-transform: translateY(0);
+    transform: translateY(0); }
+  90% {
+    opacity: .5; }
+  100% {
+    opacity: 0;
+    -o-transform: translateY(145%);
+    transform: translateY(145%); } }
+
+@keyframes ball-fall {
+  0% {
+    opacity: 0;
+    -webkit-transform: translateY(-145%);
+    -moz-transform: translateY(-145%);
+    -o-transform: translateY(-145%);
+    transform: translateY(-145%); }
+  10% {
+    opacity: .5; }
+  20% {
+    opacity: 1;
+    -webkit-transform: translateY(0);
+    -moz-transform: translateY(0);
+    -o-transform: translateY(0);
+    transform: translateY(0); }
+  80% {
+    opacity: 1;
+    -webkit-transform: translateY(0);
+    -moz-transform: translateY(0);
+    -o-transform: translateY(0);
+    transform: translateY(0); }
+  90% {
+    opacity: .5; }
+  100% {
+    opacity: 0;
+    -webkit-transform: translateY(145%);
+    -moz-transform: translateY(145%);
+    -o-transform: translateY(145%);
+    transform: translateY(145%); } }
diff --git a/app/assets/stylesheets/wizard.scss b/app/assets/stylesheets/wizard.scss
index 5f920c8918d..a67ecc01fb6 100644
--- a/app/assets/stylesheets/wizard.scss
+++ b/app/assets/stylesheets/wizard.scss
@@ -1,6 +1,7 @@
 @import "vendor/normalize";
 @import "vendor/font_awesome/font-awesome";
 @import "vendor/select2";
+@import "vendor/sweetalert";
 
 body.wizard {
   background-color: #fff;
@@ -13,6 +14,26 @@ body.wizard {
   line-height: 1.4em;
 }
 
+.wizard-warning {
+  font-family: sans-serif,
+
+  p {
+    margin-top: 0;
+  }
+
+
+  fieldset {
+    display: none;
+  }
+
+  h2 {
+    display: none;
+  }
+  .sa-icon {
+    display: none !important;
+  }
+}
+
 .select {
   width: 400px;
 }
diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index bf76a4f4856..cec3432199c 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -3238,6 +3238,7 @@ en:
 
       invites:
         add_user: "add"
+        none_added: "You haven't invited any users. Are you sure you want to continue?"
         roles:
           admin: "Admin"
           moderator: "Moderator"
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 14b1ea18dd2..a2d8a43d59b 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -3226,7 +3226,6 @@ en:
 
         fields:
           default_locale:
-            label: ""
             description: "What’s the default language for your community?"
 
       forum_title:
@@ -3289,7 +3288,6 @@ en:
         title: "Theme"
         fields:
           theme_id:
-            label: ""
             description: "Do you prefer a light or dark design? You can always further customize the look and feel of your site via Admin, Customize."
             choices:
               default: