Comment 14 for bug 1079575

Okay, so I'm going to "Won't Fix" this after some discussion with Sam.

We feel like apps should be the ones to decide whether the panel is necessary or not by using full screen. It's already possible for apps to decide that maximize = full screen (a la audience).

Introduce a hide mode to the panel adds a lot of new complex problems like animating struts, avoiding accidental unhides over a potentially very important actionable area, etc. I don't think it's worth it technically to go this route instead of just having apps use full screen when necessary.