chore: Follow up loading dialog

lib/pages/bootstrap/bootstrap_dialog.dart

@@ -371,6 +371,7 @@ class BootstrapDialogState extends State<BootstrapDialog> {
                               if (consent != OkCancelResult.ok) return;
                               final req = await showFutureLoadingDialog(
                                 context: context,
+                                delay: false,
                                 future: () async {
                                   await widget.client.updateUserDeviceKeys();
                                   return widget.client

lib/pages/device_settings/device_settings.dart

@@ -67,6 +67,7 @@ class DevicesSettingsController extends State<DevicesSettings> {
 
     await showFutureLoadingDialog(
       context: context,
+      delay: false,
       future: () => matrix.client.uiaRequestBackground(
         (auth) => matrix.client.deleteDevices(
           deviceIds,

lib/pages/settings_3pid/settings_3pid.dart

@@ -53,6 +53,7 @@ class Settings3PidController extends State<Settings3Pid> {
     if (ok != OkCancelResult.ok) return;
     final success = await showFutureLoadingDialog(
       context: context,
+      delay: false,
       future: () => Matrix.of(context).client.uiaRequestBackground(
             (auth) => Matrix.of(context).client.add3PID(
                   clientSecret,

lib/widgets/future_loading_dialog.dart

@@ -19,20 +19,23 @@ Future<Result<T>> showFutureLoadingDialog<T>({
   String? backLabel,
   String Function(dynamic exception)? onError,
   bool barrierDismissible = false,
+  bool delay = true,
 }) async {
   final futureExec = future();
   final resultFuture = ResultFuture(futureExec);
 
-  var i = 3;
-  do {
-    final result = resultFuture.result;
-    if (result != null) {
-      if (result.isError) break;
-      return result;
+  if (delay) {
+    var i = 3;
+    while (i > 0) {
+      final result = resultFuture.result;
+      if (result != null) {
+        if (result.isError) break;
+        return result;
+      }
+      await Future.delayed(const Duration(milliseconds: 100));
+      i--;
     }
-    await Future.delayed(const Duration(milliseconds: 100));
-    i--;
-  } while (i > 0);
+  }
 
   final result = await showAdaptiveDialog<Result<T>>(
     context: context,