[Usability] Add "Files..." button next to "Restore..." (Overview)
Problem
As a first-time user you're puzzled about how to restore single files.
Context
Restoring all files, in-place, is a frightening idea, and it's nice that Déjà-Dup allows to restore (older versions) of single files.
This feature is mentioned in the user interface ("or use Files to either revert"), but this text is easily overlooked or or not easily understood (what is "Files" anyway?).
Personal experience: I pressed Restore... and -- unsuccessfully -- tried to find an option to restore (*sic*) individual files in that dialog.
Proposed Solution
Add a Files... button next to the Restore... button on the "Overview" page of the Déjà-Dup user interface, e.g.
The Files... button may open the GNOME file manager in the first location configured on the "Folders to save" screen. (Note for the reader: The "Restore missing files..." context menu item is only available in those folders.)