Restoring previous version of a file

As deja-dup --restore seems to accept a list of files we send to it the path of all selected files with %F.

Adding restore previous version of a file to the context menu.

Restoring missing files

Acording to the manual deja-dup --restore-missing seems to accept a directory so we send to it the path of the first selected directory %f.

Adding restore missing files to the context menu.