fix: App crash on page navigation with open popup menu

lib/widgets/chat_settings_popup_menu.dart

@@ -52,6 +52,7 @@ class ChatSettingsPopupMenuState extends State<ChatSettingsPopupMenu> {
       children: [
         const SizedBox.shrink(),
         PopupMenuButton<ChatPopupMenuActions>(
+          useRootNavigator: true,
           onSelected: (choice) async {
             switch (choice) {
               case ChatPopupMenuActions.leave:

lib/widgets/log_view.dart

@@ -36,6 +36,7 @@ class LogViewerState extends State<LogViewer> {
             onPressed: () => setState(() => fontSize--),
           ),
           PopupMenuButton<Level>(
+            useRootNavigator: true,
             itemBuilder: (context) => Level.values
                 .map(
                   (level) => PopupMenuItem(