Show overview mode button in TouchView with open modal window
Currently, the overview mode button is only shown within
maximize mode when all of the following conditions hold:
(1) The user is logged in, and
(2) The screen is not locked, and
(3) The user is not in kiosk mode, and
(4) There are no system modal windows open.
These are the same four conditions for when overview mode may
be engaged by the user. This CL drops condition (4) for
showing the overview mode button in maximize mode, but does
not change the conditions for being able to engage overview
mode. In other words, the overview mode button will now show
for the user when there are modal windows open, but tapping
on this button will remain a no-op.