Implements #18243 - Variable / Escape: a) htmlentity, b) htmlentity all (incl....
Implements #18243 - Variable / Escape: a) htmlentity, b) htmlentity all (incl. curly braces), c) striptags
Implements #18243 - Variable / Escape: a) htmlentity, b) htmlentity all (incl. curly braces), c) striptags