remote menubar theme

Signed-off-by: 21pages <pages21@163.com>

flutter/lib/desktop/widgets/remote_menubar.dart

@@ -408,18 +408,32 @@ class _RemoteMenubarState extends State<RemoteMenubar> {
           ),
           child: SingleChildScrollView(
               scrollDirection: Axis.horizontal,
+              child: Theme(
+                data: themeData(),
                 child: MenuBar(
                   children: [
                     SizedBox(width: _MenubarTheme.buttonHMargin),
                     ...menubarItems,
                     SizedBox(width: _MenubarTheme.buttonHMargin)
                   ],
+                ),
               )),
         ),
         _buildDraggableShowHide(context),
       ],
     );
   }
+
+  ThemeData themeData() {
+    return Theme.of(context).copyWith(
+      menuButtonTheme: MenuButtonThemeData(
+          style: ButtonStyle(
+              minimumSize: MaterialStatePropertyAll(Size(64, 36)),
+              textStyle: MaterialStatePropertyAll(
+                  TextStyle(fontWeight: FontWeight.normal)))),
+      dividerTheme: DividerThemeData(space: 4),
+    );
+  }
 }
 
 class _PinMenu extends StatelessWidget {