Navbar: alternate layouts

add and configure up to 5 extra navbar layouts

Change-Id: Id1b79ade5e9a200f5dadd9d54697113558cf9421
Density changer:  use a number picker for custom DPI editText

Fuckass development is generally a pain point for users so lets not
use a regular keyboard for this anymore

Change-Id: I109458acd5a475409b0735d02684b836d3f856e8