This dims the button:
let button = OWSButton()
button.dimsWhenHighlighted = true
button.isHighlighted = true
This did not, and I think it should (last 2 lines are switched):
let button = OWSButton()
button.isHighlighted = true
button.dimsWhenHighlighted = true
This also removes an unnecessary `@objc` annotation.
I think this is a useful change on its own but I expect it to make an
upcoming change easier, too.
b459e22026