Navbar: Fix MDPI & HDPI landscape layout

Before: http://i.imgur.com/89SmFbX.png
After: http://i.imgur.com/UbuAggD.png

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: I6623cb97881313886de39a67baa98f7bd4b0696a