FIX: Use the view's container if available

app/assets/javascripts/discourse/widgets/connector.js.es6

@@ -21,7 +21,7 @@ export default class Connector {
       }
 
       const view = Ember.View.create({
-        container: widget.register,
+        container: mounted.container || widget.register,
         templateName: opts.templateName,
         context
       });