Style Fixes

set retina texture for nav

Signed-off-by: Joshua Pekera <joshuapekera@me.com>
Merge branch '2.2/develop' of https://github.com/pyrocms/pyrocms into 2.2/develop
Style Updates

adjusting various small details for better aesthetics

Signed-off-by: Joshua Pekera <joshuapekera@me.com>