WIP KeyShortcutWindow for NAT flixel

src/kiss_flixel/KeyShortcutWindow.hx

@@ -0,0 +1,9 @@
+package kiss_flixel;
+
+import kiss.Prelude;
+import kiss.List;
+import kiss_tools.KeyShortcutHandler;
+import flixel.util.FlxColor;
+
+@:build(kiss.Kiss.build())
+class KeyShortcutWindow<T> extends SimpleWindow {}