Merge pull request #562 from takeit/stablemaster

Recaptcha version fix
Merge pull request #563 from takeit/stablemaster

composer.lock update
Checks if the User is 'anon.' and returns null
Checks if the user is authenticated through the SecurityContext
Uses IS_AUTHENTICATED_FULLY
Merge pull request #564 from terwey/CS-5164

Checks if the User is 'anon.' and returns null
Merge branch 'master' of github.com:sourcefabric/Newscoop into stablemaster
[WOBS-3058] - Feedback mails should also be listed in backend > content > feedback