Add forgotten jumpToAnchor funcitonality

Was accidently removed when refactoring callOnContentReady
Process onContentReady after onElementReady

Workaround to get jumpToAnchor working
Correct solution would be having only one list of callbacks together for onContentReady and onElementReady
new modernizr version - now width html5video class
Add check for newsletter_component_id-column

Newsletter model can be exchanged so this column is not required
Merge remote-tracking branch 'github/3.7' into 3.7