Merge branch 'master' into fix-mentions-text-replace

Author: DanC5

src/components/AutoCompleteTextarea/Textarea.js

@@ -130,6 +130,7 @@ class ReactTextareaAutocomplete extends React.Component {
         this.textareaRef.selectionEnd = 0;
       }
       this.props.handleSubmit(event);
+      this._closeAutocomplete();
     }
   };