Added a loading screen on Notificatoins if isLoading

• Added:
- a loading screen on Notificatoins if isLoading

app/javascript/gabsocial/features/notifications.js

@@ -12,6 +12,7 @@ import {
   forceDequeueNotifications,
 } from '../actions/notifications'
 import NotificationContainer from '../containers/notification_container'
+import ColumnIndicator from '../components/column_indicator'
 import ScrollableList from '../components/scrollable_list'
 import TimelineQueueButtonHeader from '../components/timeline_queue_button_header'
 import Block from '../components/block'
@@ -107,6 +108,10 @@ class Notifications extends ImmutablePureComponent {
       selectedFilter,
     } = this.props
 
+    if (isLoading) {
+      return <ColumnIndicator type='loading' />
+    }
+
     let scrollableContent = null
 
     if (isLoading && this.scrollableContent) {