Merge branch '27-image-handling' of https://git.hack-hro.de/lohro/lohrothek/lohrothek-api into 27-image-handling

length is keyword

outsourced move items to subtemplate, updated url routing

frequently used by editors, one less click

if an RadioReport associated with the Moderation at the time of adding
to Broadcast, the RadioReport will be linked to the Broadcast as well.

not clever? better to query later for RadioReports of Moderations, if
so? in case a RadioReport is later than adding to a Broadcast added to
the Moderation?

detail view of radio report