UX: remove border under mobile time gap too

app/assets/stylesheets/common/base/topic-post.scss

@@ -344,12 +344,6 @@ table.md-table {
   clear: both;
 }
 
-/* hide the reply border above the time gap notices */
-.time-gap + .topic-post .topic-body,
-.time-gap + .topic-post .topic-avatar {
-  border-top: none;
-}
-
 .whisper {
   .post-info.whisper {
     margin-left: 0.5em;

app/assets/stylesheets/desktop/topic-post.scss

@@ -583,10 +583,6 @@ video {
   }
 }
 
-.small-action.deleted {
-  background-color: dark-light-diff(rgba($danger,.7), $secondary, 50%, -60%);
-}
-
 #share-link {
   width: 365px;
   margin-left: -4px;
@@ -718,6 +714,16 @@ $topic-avatar-width: 45px;
   border-top: 1px solid dark-light-diff($primary, $secondary, 90%, -75%);
 }
 
+.small-action.deleted {
+  background-color: dark-light-diff(rgba($danger,.7), $secondary, 50%, -60%);
+}
+
+/* hide the reply border above the time gap notices */
+.time-gap + .topic-post .topic-body,
+.time-gap + .topic-post .topic-avatar {
+  border-top: none;
+}
+
 .posts-wrapper {
   position: relative;
   -webkit-font-smoothing: subpixel-antialiased;

app/assets/stylesheets/mobile/topic-post.scss

@@ -15,13 +15,18 @@
 
   .small-action-desc {
     padding-top: 1em;
-    
+
     button {
       padding-top: 0px;
     }
   }
 }
 
+/* hide the reply border above the time gap notices */
+.time-gap + .topic-post article {
+  border-top: none;
+}
+
 .topic-post article {
   border-top: 1px solid dark-light-diff($primary, $secondary, 90%, -60%);
   padding: 8px 0;