Revert "refactor: Dialog BuildContext"

This reverts commit 315a43c1a4.

lib/utils/background_push.dart

@@ -324,7 +324,7 @@ class BackgroundPush {
   }
 
   Future<void> setupUp() async {
-    await UnifiedPush.registerAppWithDialog(matrix!.navigatorContext);
+    await UnifiedPush.registerAppWithDialog(matrix!.context);
   }
 
   Future<void> _newUpEndpoint(String newEndpoint, String i) async {

lib/utils/uia_request_manager.dart

@@ -22,7 +22,7 @@ extension UiaRequestManager on MatrixState {
         case AuthenticationTypes.password:
           final input = cachedPassword ??
               (await showTextInputDialog(
-                context: navigatorContext,
+                context: context,
                 title: l10n.pleaseEnterYourPassword,
                 okLabel: l10n.ok,
                 cancelLabel: l10n.cancel,
@@ -62,7 +62,8 @@ extension UiaRequestManager on MatrixState {
           );
           if (OkCancelResult.ok ==
               await showOkCancelAlertDialog(
-                context: navigatorContext,
+                useRootNavigator: false,
+                context: context,
                 title: l10n.weSentYouAnEmail,
                 message: l10n.pleaseClickOnLink,
                 okLabel: l10n.iHaveClickedOnLink,
@@ -85,8 +86,9 @@ extension UiaRequestManager on MatrixState {
           launchUrlString(url.toString());
           if (OkCancelResult.ok ==
               await showOkCancelAlertDialog(
+                useRootNavigator: false,
                 message: l10n.pleaseFollowInstructionsOnWeb,
-                context: navigatorContext,
+                context: context,
                 okLabel: l10n.next,
                 cancelLabel: l10n.cancel,
               )) {

lib/utils/url_launcher.dart

@@ -189,6 +189,7 @@ class UrlLauncher {
       }
       if (roomIdOrAlias.sigil == '!') {
         if (await showOkCancelAlertDialog(
+              useRootNavigator: false,
               context: context,
               title: 'Join room $roomIdOrAlias',
             ) ==

lib/utils/voip/callkeep_manager.dart

@@ -247,6 +247,7 @@ class CallKeepManager {
     showDialog(
       context: context,
       barrierDismissible: true,
+      useRootNavigator: false,
       builder: (_) => AlertDialog(
         title: Text(L10n.of(context)!.callingPermissions),
         content: Column(