Issue #2670730 by chr.fritsch, robpowell, alexpott, tstoeckler, Berdir, bojanz, dawehner: Provide a delete action for each content entity type

Issue #2916740 by chr.fritsch, xjm, Manuel Garcia, tstoeckler, alexpott, seanB, Sam152, amateescu, tim.plunkett, dawehner, larowlan, Berdir: Add generic entity actions