Solution for: Differentiate Locked and Unlocked Backgrounds (#4261)

1. Added two new background-specific styles to `customizer.styl` (4px gray border and 4px white border) and utilized them in `profile.jade` by checking for ownership of the asset and displaying a border (or not, as appropriate). 

2. Editor automatically cleaned up some trailing spaces on a few lines of `profile.jade`
It works exactly as you might expect. Thanks for the assist. Bookmarked that answer, too!

Getting a conflict now for some reason when I try to commit. Once I resolve I will push.