Merge branch 'EngincanV/cms-kit-enh' of https://github.com/abpframework/abp into EngincanV/cms-kit-enh

modules/cms-kit/src/Volo.CmsKit.Admin.Application/Volo/CmsKit/Admin/Menus/MenuItemAdminAppService.cs

@@ -163,7 +163,7 @@ public class MenuItemAdminAppService : CmsKitAdminAppServiceBase, IMenuItemAdmin
         );
     }
 
-    public async Task<int> GetAvailableMenuOrderAsync(Guid? parentId = null)
+    public virtual async Task<int> GetAvailableMenuOrderAsync(Guid? parentId = null)
     {
         var highestOrder = await MenuItemRepository.GetHighestMenuOrderAsync(parentId);
         return highestOrder + 1;