Robert Garrett
0c042f9937
The two buttons ("close" and the "Big Red" button) have identical hover
code, except for which color theme they select. I was about to start
work on the cutting board, particularly it's cut-line selectors, and
realized that would make a 3rd copy of this code.
This commit adds just the background color handler. It seems to work as
expected on the CloseButton. I'll finish removing the old observers once
I have the BorderColor version in place.