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)
Tweak to remove obsolete logic (and fix joined-panel case).

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)
Fixing typo.

Enyo-DCO-1.1-Signed-Off-By: Gray Norton (gray.norton@lge.com)
Merge pull request #1328 from enyojs/BHV-8682-graynorton

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