Adds possibility to center map on given item
Adds possibility to center map on given item

For Usergroups you can use the shortname of the group, for
joind.in-events you can use the event-id and for mentorship you can use
the github-name the user registered with.

php-ug/php.ug,heiglandreas/php.ug,heiglandreas/php.ug,php-ug/php.ug,php-ug/php.ug,heiglandreas/php.ug,php-ug/php.ug,heiglandreas/php.ug