Create the 'About content' widget

There should be an aboutcontent widget that has 2 different tabs. The first tab is the Details tab and shows the metadata of the content (title, description, url, created by). When a description is not available, it should not be shown. The second tab is the Shared with tab and shows the list of members of the content.
Yeah, `largeDefault` is not the problem. The problem is that the value of `addVisibilityIcon` is changed in the line above and then not set back below, causing the wrong `addVisibilityIcon` value to be passed in for details and compact items.