Add Lightbox option

As an editor I want to able to activate an Lightbox option for news and media elements.

Example link: https://stage.typo3.org/article/typo3org-team-sprint-in-frankfurt-jan-2018/

UAC:

• in text & media element the option "Enlarge on Click" can be used. If enabled a Lightbox is shown for current element
• in news (if I use more than one image), there should be Lightbox automatically