Fix overscan issue on OUYA for TV Show and Season menus.
Issue #139: Make sure TV Show Season gallery gets focus when created

When first entering the view, make sure the TV Show season gallery receives
the focus instead of the Menu button.
Issue #149: Add Preference for Overscan compensation

Adds a preference to compensate for Overscan on devices like the OUYA
which don't provide a built in mechanism to adjust things like a Google TV
device does.

If enabled, will adjust the main layout to compensate for the overscan of
some TVs so that all items can be displayed on the screen.