Checkbox Display Bug

[Bob Sneidar]

Hi all. 

I added to the bug 18298 but this may be a new bug. Once a checkbox has been interacted with in the Windows environment, the showBorder is ALWAYS on even if the property is turned off in the object inspector. It also shows up with a border in OS X dev environment which normally will NOT show the border even if the property is turned on! Not fatal, but ugly. I posted a simple demo stack. 

Bob S