selectable label tap handling now works
removed some logs in dlselectablelabel
changed all mentions of choice picker to choice dialog
fix bug where choice dialog does not close after selection
Dialog customization is now ready for usage :satisfied:.

Now using the open source class CCScale9Sprite to draw a custom dialog
background from a stretchable image. CCScale9Sprite is also modified a
bit so that it does not depend on any more files like it was previously.

CCScale9Sprite's git repo can be found here
(https://github.com/YannickL/CCControlExtension/tree/master/CCControlExtension/CCControl/Utils).