Fix infinite loop in collection parent detection
Add debug output to migration database version check
Merge setting to one line so it can be easily programmatically overridden
Add stderr output to standalone pdfthumbnail.py tool
Fix PDF thumbnail creation for Linux
Don't generate log files with potentially extremely long file names
Fix indexing delay (cached setting was expiring before import was done)
Fix invalid solr query when user does not have access to any storage
Switch advanced search page from 404 to message if no collections available
Add message to otherwise empty overview page if no collections available
Fix exception when logging from a module without source code
Remove many records at once during migration cleanup
Open administration page in new window
Remove potential duplicate records in identifier search results