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 very well could be. I couldn't figure out how to implement so all the backgrounds properly showed with a simple `ng-class` addition. No matter what variation I tried, I always got the elements not selected by the `ng-class` to not show up.

Bear in mind, AngularJS is a bit of an "English as a second language" for me and this is the first ever code I've written in it, so it is entirely possible I am missing one or more nuances of the `ng-class`. If you believe it is possible, I will go back to the drawing board and push through it and figure it out.

Thanks for the feedback.