reset group settings if private checkbox is used
lang changes
fetch Group Notes (and display them)
show group stuff if private = 0
back button
integrate logic for creating group notes
add method encryptForMultipleKeys
use special method for fetching groups (only user groups are fetched now)

- make userId injectable
- cs
fix typo
refactor fetchUserGroups to work as it should
make group field an association to group entity