Merge pull request #793 from pangeachat/better-event-clearing

check if mounted before clearing selected events, clear selected even…

lib/pages/chat/chat.dart

@@ -560,6 +560,7 @@ class ChatController extends State<ChatPageWithRoom>
     //#Pangea
     choreographer.stateListener.close();
     choreographer.dispose();
+    clearSelectedEvents();
     MatrixState.pAnyState.closeOverlay();
     //Pangea#
     super.dispose();
@@ -1334,13 +1335,18 @@ class ChatController extends State<ChatPageWithRoom>
   }
   // Pangea#
 
-  void clearSelectedEvents() => setState(() {
+  void clearSelectedEvents() {
+    // #Pangea
+    if (!mounted) return;
+    // Pangea#
+    setState(() {
       // #Pangea
       closeSelectionOverlay();
       // Pangea#
       selectedEvents.clear();
       showEmojiPicker = false;
     });
+  }
 
   void clearSingleSelectedEvent() {
     if (selectedEvents.length <= 1) {