Implement resource deletion.

Assets/Cryville/Crtr/Browsing/UI/PathedResourceBrowser.cs

@@ -109,5 +109,17 @@ namespace Cryville.Crtr.Browsing.UI {
 		public void OnPathClicked(int index) {
 			_manager.ReturnToDirectory(index);
 		}
+
+		public void OnDeleteClicked() {
+			if (_selectedItems.Count == 0) {
+				Popup.Create("No item is selected.");
+				return;
+			}
+			Dialog.Show(DeleteSelectedItems, "Are you sure to delete the selected item(s)?", "Yes", "No");
+		}
+		void DeleteSelectedItems(int result) {
+			if (result != 0) return;
+			foreach (var item in _selectedItems.OrderByDescending(i => i)) _manager.RemoveAt(item);
+		}
 	}
 }