Created a new prototype push button with programatically changed fills (as opposed to a separate set of nodes) and a 2D gradient.  Integrated into Balancing Act in order to demo to design team.
Created a new prototype push button with programatically changed fills (as opposed to a separate set of nodes) and a 2D gradient.  Integrated into Balancing Act in order to demo to design team.

phetsims/scenery-phet,phetsims/scenery-phet,phetsims/scenery-phet