refactor: Dialog BuildContext

lib/widgets/chat_settings_popup_menu.dart

@@ -106,12 +106,12 @@ class ChatSettingsPopupMenuState extends State<ChatSettingsPopupMenu> {
             switch (choice) {
               case 'leave':
                 final confirmed = await showOkCancelAlertDialog(
-                  useRootNavigator: false,
                   context: context,
                   title: L10n.of(context)!.areYouSure,
                   okLabel: L10n.of(context)!.ok,
                   cancelLabel: L10n.of(context)!.cancel,
                   message: L10n.of(context)!.archiveRoomDescription,
+                  isDestructiveAction: true,
                 );
                 if (confirmed == OkCancelResult.ok) {
                   final success = await showFutureLoadingDialog(

lib/widgets/fluffy_chat_app.dart

@@ -52,16 +52,10 @@ class FluffyChatApp extends StatelessWidget {
         builder: (context, child) => AppLockWidget(
           pincode: pincode,
           clients: clients,
-          // Need a navigator above the Matrix widget for
-          // displaying dialogs
-          child: Navigator(
-            onGenerateRoute: (_) => MaterialPageRoute(
-              builder: (_) => Matrix(
-                clients: clients,
-                store: store,
-                child: testWidget ?? child,
-              ),
-            ),
+          child: Matrix(
+            clients: clients,
+            store: store,
+            child: testWidget ?? child,
           ),
         ),
       ),

lib/widgets/matrix.dart

@@ -71,6 +71,8 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
 
   BackgroundPush? backgroundPush;
 
+  late BuildContext navigatorContext;
+
   Client get client {
     if (widget.clients.isEmpty) {
       widget.clients.add(getLoginClient());
@@ -311,7 +313,8 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
       };
       request.onUpdate = null;
       hidPopup = true;
-      await KeyVerificationDialog(request: request).show(context);
+
+      await KeyVerificationDialog(request: request).show(navigatorContext);
     });
     onLoginStateChanged[name] ??= c.onLoginStateChanged.stream.listen((state) {
       final loggedInWithMultipleClients = widget.clients.length > 1;
@@ -322,7 +325,7 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
         _cancelSubs(c.clientName);
         widget.clients.remove(c);
         ClientManager.removeClientNameFromStore(c.clientName, store);
-        ScaffoldMessenger.of(context).showSnackBar(
+        ScaffoldMessenger.of(navigatorContext).showSnackBar(
           SnackBar(
             content: Text(L10n.of(context)!.oneClientLoggedOut),
           ),
@@ -382,7 +385,7 @@ class MatrixState extends State<Matrix> with WidgetsBindingObserver {
         onFcmError: (errorMsg, {Uri? link}) async {
           final result = await showOkCancelAlertDialog(
             barrierDismissible: true,
-            context: context,
+            context: navigatorContext,
             title: L10n.of(context)!.pushNotificationsNotAvailable,
             message: errorMsg,
             fullyCapitalizedForMaterial: false,