Send unanswered questions and answer count over web sockets
Merge branch 'master' of https://github.com/felix-schmidt/arsnova-backend into felix-schmidt-master
Merge branch 'felix-schmidt-master'
Merge branch 'master' of https://github.com/felix-schmidt/arsnova-backend into felix-schmidt-master
Merge branch 'felix-schmidt-master'
Fixed c&p error that displayed a wrong answer count
Fixed NullPointerException if question does not exist
Cleaner use of interposed entity with additional web socket support
Fixed #11008: secured interposed questions
Merge branch 'interposed-cleanup'
Fixed test case
Do not trust users when they provide an object
Cap learning progress at 100 percent
Fixed #12048: Allow answer deletion based on question variant
Merge branch 'master' of https://github.com/thm-projects/arsnova-backend