Fixes and minor improvements
- crash fix: allow non-users (teams) in log view
#1814 - Crash reporting: avoid several dialog
#1812 - add some textual explanation about associated activity
#1815 - increase the save interval for answer-state
#1816 - Changes approach for create e2e group, adds clean old e2e groups
#1809 - Fixes join group by code e2e
#1810