We were calling twice showPage() with the correct page, here and in
show() / zoomFromOverview given that _resetShowAppsbutton was called
from the signal 'showing' of overview. Given that the call to
_resetShowAppsbutton is only actually used when hiding the overview we
can actually put the checked state of the button to false when animating
from overview so it shows the workspace page, causing the same behavior
of _resetShowAppsbutton without all the shenanigans of resetting when
the hiding overview signal is triggered.
https://bugzilla.gnome.org/show_bug.cgi?id=732901
5d12ab415c