FileBrowser: Clean up quick menu
Some items in the quick menu are unnecessary any more:
- Home (Bookmark can be made)
- Go up (inherited into pathbar)
- refresh? (I think there is a watch socket?)
- upload? (It’s in the background menu)
- …?
(from redmine: issue id 2157, created on 2015-03-02 by fabian.heidemann)