- added hint that markdown no longer supports html

- also see changelog

- also see changelog (some fixes)

- removing users from teh manage active users site now displays a dialog
- one can no longer remove himself via multi select n the manage active users site

- fixed issue where the subsequent/after editor reset was not correctly setting the session

- fixed issue where group overview page didn't worked because we imported from the wrong module (loadash instead of lodash-es)
- upgraded semantic ui react version
  - fixed some icon isssues