Removed status bar clock on lockscreen

Only works if the deskclock widget is being used, or a Minimalistic text widget is present, a UCCWidget is present
or a DashClock widget is presentx

If you're on a page with one of those widgets, the status bar clock is removed, otherwise, the clock will be there

Change-Id: I48bac69b30e95ddfe231d446b12cb95420d96778