Add cap sprite to child scene and update project configuration

addons/guide/editor/array_edit/dragger.gd

@@ -0,0 +1,8 @@
+@tool
+extends Button
+
+var _parent_array:Variant
+var _index:int
+
+func _get_drag_data(at_position):
+	return { "parent_array" : _parent_array, "index" : _index }