add changelog entry
add example to spec new feature
add further examples
add method to not render content-tab when no page is not translated
korrect methods
do not show content tab when page is not persisted
update changelog entry
add new method to reduce reduntant if-statements
refactor translated? method to make sense to naming
optimize translated? method
Merge pull request #155 from screenconcept/features/cms_tab_nav_optimizing

Features/cms tab nav optimizing