test new favicon for gro.plan
insert favicon from https://owncloud.gwdg.de/index.php/apps/files/?dir=/eRA/02_Services&fileid=106093582#/files_mediaviewer/favicon_GROplan.png . create 16x16
insert favicon from https://owncloud.gwdg.de/index.php/apps/files/?dir=/eRA/02_Services&fileid=106093582#/files_mediaviewer/favicon_GROplan.png . create 16x16