Template and front page updates

• Widening of notes field on detail page for all entities
• Removal of GND id and Bruckner XML filters for Person
• Person: add explanation that not all links have been worked out yet
• Removal of ID filter for all entities
• Works: short quote in initial search results table
• Front page: Photo source under search mask
• Translated Skos to "Schlagwort" on multiple occasions