Swap rest pose actions in the Skeleton2D editor

The texts were changed before, but the actions weren't swapped around.
This led to unexpected behavior.

(cherry picked from commit 4ff1431993)

editor/plugins/skeleton_2d_editor_plugin.h

@@ -40,8 +40,8 @@ class Skeleton2DEditor : public Control {
 	GDCLASS(Skeleton2DEditor, Control);
 
 	enum Menu {
-		MENU_OPTION_MAKE_REST,
 		MENU_OPTION_SET_REST,
+		MENU_OPTION_MAKE_REST,
 	};
 
 	Skeleton2D *node;