Bookmarks Overview
1)Image - Groups, People, Feed posts would use profile pictures. Files would use preview for images, file type icon otherwise. Links would pull preview or default to a link icon. Topics - icon. Icon would also be shown if accounts, records, etc. are bookmarked
2)Name - Default to group, person, link, topic, or file name. For feeds use formatting: "Group posted to - Author Name" Followed by teaser text and authored date
3) Bookmark Type
4)Actions - Pin/Unpin to top, and Share bookmark buttons. Actions would darken on hover, Pin icon would be light if not pinned to top and dark when item is pinned. Clicking on pin icon moves bookmark to pinned list / Removes from pinned list.