This optionally allows accessing data in /media/ folders, if the user
issues:
snap connect subsurface:removable-media
https://docs.snapcraft.io/removable-media-interface
Signed-off-by: Michał Sawicz <michal@sawicz.net>
snapcraft doesn't support remote parts any more, and there's no
extension (the replacement for remote parts) for Qt yet.
Signed-off-by: Michał Sawicz <michal.sawicz@canonical.com>