I actually tried to position:absolute it before, but there was the issue when a long file list was scrolled down, it also scrolled the editor window.

I have a nice idea to solve this though:
 - Remove the file display on edit, save the scroll position
 - Slide in the editor in like in a normal folder switch
 - On close, request an data update from the server, and slide the editor out and make place for the content

I'll see to implement this as clean as possible, so we're having a easier time later with multiple views.