Datapickers in Call for Events/Booths/Tracks were broken which made impossible
to create them (as the date is required).
Those are not the only Datepickers broken and a similar solution should work
for the rest as well.
Fixes https://github.com/openSUSE/osem/issues/2349
closes#1650
done some changes
minor changes
added markdown format to cfp#show
fixed description text position in proposals
fixed truncated description text in show action
minor changes on non-admin side
