Fixes quest UI opening and closing after WoD.
Done by no longer trying to entirely replace the blizzard UI, but rather replacing
it only when "L" (Toggle Quest).  When Carbonite window is shown, we no longer try to
hide/replace the default UI which is now tightly coupled with the mapping UI.
Map toggles toggle the map. Quest toggle changes visibility of Carbonite quest UI.
Never do the two interact anymore.
Hide the quest frame on initial open
Merge remote-tracking branch 'origin/quest-ui' into quest-ui

Conflicts:
	Carbonite.Quests/NxQuest.lua