Allow translucent navigation bar in landscape mode.

Change-Id: I5388f3f8a34533624619714bacfba52f95fc6d85
On-The-Spot: Add information on how to reset preferences

Info is added to the main On-The-Spot preference dialog.
https://dl.dropboxusercontent.com/u/90317107/on_the_spot_pref_helper.png
(As suggested by +Carlo Savignano)

I have one improvement in mind.
It would be nice to make the reset hint title ("To reset preferences:")
clickable to toggle the more informative reset message.
(Similar to the permission overview in the Play Store)
But I'll need some time to read more on how do to that.

PS 2:
* delete unneeded code

PS 3:
* Unclutter OTS Dialog
Change-Id: Iaf4f67e4b03babd1d6a604c2524781a748dd8025
Signed-off-by: kajuten <julian.kaltenhofer@gmail.com>