[file chooser dialogbox] Respect standard gtk/gnome behaviour
@bilboed
Submitted by Edward Hervey Assigned to Brandon Lewis @brandon_lewis
Description
The file chooser is a complete mess.
There's several way to use it (only files, or only folders).
It should behave like any other gtk/gnome application. That is:
- Common way to choose a file and/or directory
- Should allow selecting multiple files/directories
- Should close once we click "Add"
- 'maybe' provide an option to allow recursivity or not
Also, there should only be ONE button to reach that (and not two : one for file, one for folders).
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=432654