Added Selektionskennzeichen to index_fields (ubpb/catalog#305)
Set max-height for thumbnail to handle (much too) big thumbnails (closes ubpb/catalog#314)
Removed ':' in front ob isbn/issn (closes ubpb/catalog#307)
Additionally hide secondary form informations if something is a journal (ubpb/catalog#286) (closes ubpb/catalog#309)
Replaced wrong abbreviation 'z.Z.' for 'zurzeit' with 'zurzeit' (closes ubpb/catalog#311)
Don't show 'Sie betrachten eine Sekundärform ...' (closes ubpb/catalog#312)
Improve printability of short title view (closes ubpb/catalog#315)