fix: Clean up rooms when redirecting to a new one.

JitsiConferenceEventManager.js

@@ -225,6 +225,7 @@ JitsiConferenceEventManager.prototype.setupChatRoomListeners = function() {
     this.chatRoomForwarder.forward(XMPPEvents.REDIRECTED,
         JitsiConferenceEvents.CONFERENCE_FAILED,
         JitsiConferenceErrors.REDIRECTED);
+    chatRoom.addListener(XMPPEvents.REDIRECTED, () => conference.leave());
 
     this.chatRoomForwarder.forward(XMPPEvents.BRIDGE_DOWN,
         JitsiConferenceEvents.CONFERENCE_FAILED,