Updated db/structure.sql
[#51063813] Administer models and users in group edit/new view
leihs now specifies stable version centrally, like Madek.
Whoops, Alpha 5 has not actually been accepted yet.
[#51391839] Suche in Modellliste
[#51396761] Hovern in Modellliste
[#51398781] Explorative Suche (ohne Breadcrumb)
[#51400905] Hauptsuche - Funktionalität