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.
Rather than giving all users the default password, which is not a realistic test, I'd prefer to give the users a randomized password and pass it back in the arguments of the `userUtil().createUsers` callback function.