Added rollback into the admin menu, fixed a bug where players would crash upon trying to view their own logs on relog.

core/assets/bundles/bundle.properties

@@ -70,6 +70,8 @@ text.server.bans=Bans
 text.server.bans.none=No banned players found!
 text.server.admins=Admins
 text.server.admins.none=No admins found!
+text.server.rollback=Rollback
+text.server.rollback.numberfield=Rollback Amount:
 text.server.add=Add Server
 text.server.delete=Are you sure you want to delete this server?
 text.server.hostname=Host: {0}