Move the empty content message to the description as per nextcloud/vue-dashboard 1.0.1
Move the empty content message to the description as per nextcloud/vue-dashboard 1.0.1

Signed-off-by: Joas Schilling <ab43a7c9cb5b2380afc4ddf8b3e2583169b39a02@schilljs.com>

nextcloud/spreed,nextcloud/spreed,nextcloud/spreed