Show only useful links for balloon runners.
Replace multiple login options with a single one.

Since a user can be jury and team member at the same time, the
difference does not make sense any longer. Based on the user's roles,
he is redirected to the most probable wanted interface.
Also added possibility to switch between jury and team interfaces and
login name below clock.
Remove logout button from menu bar.
Fix two PHP notices.
Fix self-closing tag: it's closed later.