Add ContentItem.OnContextMenu

Source/Editor/Content/Items/ContentItem.cs

@@ -505,6 +505,14 @@ namespace FlaxEditor.Content
             }
         }
 
+        /// <summary>
+        /// Called when context menu is being prepared to show. Can be used to add custom options.
+        /// </summary>
+        /// <param name="menu">The menu.</param>
+        public virtual void OnContextMenu(FlaxEditor.GUI.ContextMenu.ContextMenu menu)
+        {
+        }
+
         /// <summary>
         /// Called when item gets renamed or location gets changed (path modification).
         /// </summary>

Source/Editor/Windows/ContentWindow.ContextMenu.cs

@@ -123,6 +123,7 @@ namespace FlaxEditor.Windows
                 // Custom options
                 ContextMenuShow?.Invoke(cm, item);
                 proxy?.OnContentWindowContextMenu(cm, item);
+                item.OnContextMenu(cm);
 
                 cm.AddButton("Copy name to Clipboard", () => Clipboard.Text = item.NamePath);