adjust UI

Gallery.Util/Interface/IGallerySource.cs

@@ -1,5 +1,6 @@
 using System.Threading.Tasks;
 using Gallery.Util.Model;
+using Xamarin.Forms;
 
 namespace Gallery.Util.Interface
 {
@@ -7,10 +8,16 @@ namespace Gallery.Util.Interface
     {
         string Name { get; }
 
+        string Route { get; }
+
+        string FlyoutIconKey { get; }
+
         string HomePage { get; }
 
         void SetCookie();
 
+        void InitDynamicResources(string family, ResourceDictionary light, ResourceDictionary dark);
+
         Task<GalleryItem[]> GetRecentItemsAsync(int page);
     }
 }