Remove DT logo, no longer used

Change-Id: Ied2d83dd664be1ee2bf788f3e2dc42abc3280edf

Conflicts:
	res/layout/dt_logo.xml
Fix miscalculation of diplay info under Extra Info

Change-Id: I0a0bfd64067daadebe576d579b2517956206465b
Improve Dirty Tweaks

Thanks to Andreas Stuetz

Change-Id: I8acda0974c792aa9ef98b3395472b7b353529536