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.
This causes there to be 2 scrollbars when using a mobile phone (scrolling modal + scrolling inside modal). We should add a media query that reduces the max-height for small devices so the container fits on the screen without having to scroll the modal