Vuforia Tree widget now has highlight model option in the design view

I had a few requests to provide a highlight model option without using the Mapper widget. So updated the COETree to allow you to highlight model with a checkbox option on the COETree in the design view plus a button in UI to use Green red and yellow  (default is green) 

 https://github.com/stevegw/COETree/releases/tag/V1.0.6