Close the participant menu when selecting an item in it
Close the participant menu when selecting an item in it

For consistency with other menus the participant menu should be closed
when an item is selected; other menus may be implicitly closed when the
request from the server is received and their view is rendered again,
but the participant view "remembers" the menu state, so if it is not
explicitly closed it is automatically opened again when the request is
received.

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

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed