Fixes BHV-8682. Made panels and drawers generally unspottable...

...when hidden.

This fixed the specific issue described in BHV-8682 but should also fix a whole class of issues where focus would seemingly disappear in 5-way mode because something offscreen was sneakily grabbing focus.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)