Reducce cpu usage by not using clip_to for each and every element

lib/cyberarm_engine/ui/element.rb

@@ -284,9 +284,7 @@ module CyberarmEngine
       @style.background_nine_slice_canvas.draw
       @style.border_canvas.draw
 
-      Gosu.clip_to(@x, @y, width, height) do
+      render
-        render
-      end
     end
 
     def debug_draw