edfu: Improve »photo not available« text
newArray View Helper: add ability to drop empty values

to give us a way of not cluttering URLs with empty parameters
Update partials to pass the extended parameter more reliably

Quite a few strucutral changes
+ extra line breaks in tags to improve legibility
edfu: update partials for better links
germania-sacra: update templates for better links

+ a little cleanup
+ add Ort in extended search
HANS: improve person link in template