This check is confusing. It lets us make the parent window key without dismissing the popover, which seems contrary to the docs for RBLPopoverBehaviorSemiTransient:
Closes the popover only if there is a
mouse up within the popover's parent
window or `esc` is pressed.
This check is confusing. It lets us make the parent window key without dismissing the popover, which seems contrary to the docs for
RBLPopoverBehaviorSemiTransient
: