Vector images and hide option for movies

Apps can have vector images (works on basically all browser versions, falls back to PNG), The vectors should be 160x165 not 160x169 like PNGs.
The plugins app only restarts the server when you click back if a plugin has been installed/upgraded/removed. And when the server does restart it shows a message saying whats happening.
Also fixed the plugins app (and possibly the music and tv apps) which I broke in an earlier commit (sorry)
Added a delay to the Movie's app backdrop changing on hover, so it doesn't flash when moving from one movie to another.