PLT-5140: Display loading screen when switching team (#5475)

* fix: clear channel list on team change

* fix committed config

* fix: no need to use anothe var

* fix: better channel list clearing

* remove unused function

* fix: display loading screen when switching team

* fix: display loading screen when switching team

* fix: clear channel list on team change

* fix committed config

* fix: no need to use anothe var

* fix: better channel list clearing

* remove unused function

* remove duplicate EnableUserTypingMessages

webapp/components/sidebar.jsx

@@ -187,6 +187,9 @@ export default class Sidebar extends React.Component {
     }
 
     onChange() {
+        if (this.state.currentTeam.id !== TeamStore.getCurrentId()) {
+            ChannelStore.clear();
+        }
         this.setState(this.getStateFromStores());
         this.updateTitle();
     }