Bookmarks perso

Links displayed on personal page are now using userBookmarks collection.

• bookmarks can now be favorited/unfavorited in bookmarks management page
• by default, favorite bookmarks appear in a specific zone in personal page (same as services or groups)
• in advanced mode, bookmarks can be edited (except for tag) or unfavorited from personal page
• bookmarks can no longer be deleted from personal page (use bookmarks management page instead)