WIP: icon database

Windows/Forms/BookmarkTreeView.cs

@@ -1,4 +1,5 @@
-using bzit.bomg;
+using BookmarkManager;
+using bzit.bomg;
 using bzit.bomg.Models;
 using System;
 using System.Collections.Generic;
@@ -519,6 +520,9 @@ namespace RyzStudio.Windows.Forms
             }
         }
 
+        [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
+        public IconDatabase IconDatabase { get; set; } = null;
+
         [Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         public ContextMenuStrip RootContextMenu { get; set; } = null;