Make names in screen view consistent with video view
Make names in screen view consistent with video view

This also fixes a minor issue in which the screen of registered users
that had no audio nor video were shown as "Guest's screen" (now no name
is shown, though, although that is consistent with the video view).

Signed-off-by: Daniel Calviño Sánchez <bd7629e975cc0e00ea7cda4ab6a120f2ee42ac1b@gmail.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed