Added websocket event and webapp handler for updating user roles (#6953)

webapp/actions/websocket_actions.jsx

@@ -170,6 +170,10 @@ function handleEvent(msg) {
         handleUserUpdatedEvent(msg);
         break;
 
+    case SocketEvents.MEMBERROLE_UPDATED:
+        handleUpdateMemberRoleEvent(msg);
+        break;
+
     case SocketEvents.CHANNEL_CREATED:
         handleChannelCreatedEvent(msg);
         break;
@@ -321,6 +325,11 @@ function handleUpdateTeamEvent(msg) {
     TeamStore.updateTeam(msg.data.team);
 }
 
+function handleUpdateMemberRoleEvent(msg) {
+    const member = JSON.parse(msg.data.member);
+    TeamStore.updateMyRoles(member);
+}
+
 function handleDirectAddedEvent(msg) {
     getChannelAndMyMember(msg.broadcast.channel_id)(dispatch, getState);
     PreferenceStore.setPreference(Preferences.CATEGORY_DIRECT_CHANNEL_SHOW, msg.data.teammate_id, 'true');