Currently, when you click the button to set up file associations on
Windows, the dialog presented is untitled and just displays the file
name, "vlc".

Close #5711
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
(cherry picked from commit 8634f761)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>