app: Apply titleSpacing for ChooseAccountPage's app bar

Signed-off-by: Zixuan James Li <[email protected]>

Author: PIG208

lib/widgets/app.dart

@@ -279,6 +279,7 @@ class ChooseAccountPage extends StatelessWidget {
     final globalStore = GlobalStoreWidget.of(context);
     return Scaffold(
       appBar: AppBar(
+        titleSpacing: 16,
         title: Text(zulipLocalizations.chooseAccountPageTitle),
         actions: const [ChooseAccountPageOverflowButton()]),
       body: SafeArea(

lib/widgets/app_bar.dart

@@ -8,6 +8,7 @@ import 'store.dart';
 class ZulipAppBar extends AppBar {
   ZulipAppBar({
     super.key,
+    super.titleSpacing,
     required super.title,
     super.backgroundColor,
     super.shape,