[TASK] Update policy to latest Neos changes of securing all controllers
[TASK] Update NodeTypes groups and icons to latest Neos changes
[TASK] Update and refactor TypoScript to updated default TypoScript

Use shorter syntax where possible and refactor some expressions to new
processor possibilities.
Merge branch 'neos-alpha-6' of github.com:chlu/RobertLemke.Plugin.Blog into chlu-neos-alpha-6