fixed: repeated change of publication date did add another- instead of modifying existing publication date filter criteria
made summon openURL link open in new tab
* Improved log messages
* Convert institutions from holdings to lowercase
* Translate institutions in result listings library popup
* Bugfix: Open selected library group
fixed: publication year slider label was missing ("Other")
hid summon publication date slider
Merge remote-tracking branch 'origin/development' into development
* Adapted advanced search to new format
Merge branch 'development' into release