prod: lots of (minor) fixes (!952) · Merge requests · hub / hub

HeJ requested to merge develop into production Dec 28, 2023

schedule import: remove room assignment on depublishing (which is the default 'removal' option now)
schedule export: additional attributes & days end at 6am, too
UI fahrplan: max-width for columns
UI room: only show relevant links (NOT the internal VOC stream identifier)
UI startpage: hide buttons in event view

prod: lots of (minor) fixes