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`
Since the background is also white, it would be the same as marking it transparent, right?

In my opinion, I think it should either be a color that contrasts with the background, maybe a light gray compared to the locked version's dark gray, or transparent. 

If it's transparent, and we introduce some background color changing feature in the future (or someone writes a chrome extension that modifies the background color), the white border background won't look out of place.