button: Make ZulipMenuItemButton.style required

Author: chrisbobbe

lib/widgets/action_sheet.dart

@@ -376,6 +376,7 @@ abstract class ActionSheetMenuItemButton extends StatelessWidget {
   Widget build(BuildContext context) {
     final zulipLocalizations = ZulipLocalizations.of(context);
     return ZulipMenuItemButton(
+      style: ZulipMenuItemButtonStyle.menu,
       icon: icon,
       label: label(zulipLocalizations),
       onPressed: () => _handlePressed(context),

lib/widgets/button.dart

@@ -327,7 +327,7 @@ class MenuButtonsShape extends StatelessWidget {
 class ZulipMenuItemButton extends StatelessWidget {
   const ZulipMenuItemButton({
     super.key,
-    this.style = ZulipMenuItemButtonStyle.menu,
+    required this.style,
     required this.label,
     this.subLabel,
     required this.onPressed,

lib/widgets/subscription_list.dart

@@ -185,6 +185,7 @@ class _SubscriptionListPageBodyState extends State<SubscriptionListPageBody> wit
               sliver: SliverToBoxAdapter(
                 child: MenuButtonsShape(buttons: [
                   ZulipMenuItemButton(
+                    style: ZulipMenuItemButtonStyle.menu,
                     label: zulipLocalizations.navButtonAllChannels,
                     icon: ZulipIcons.chevron_right,
                     onPressed: () => Navigator.push(context,