If you are on the Dashboard and decide to do a bulk operation on all the bookmarks of a Category (adding a tag or moving the bookmarks to the Catalog or to another Category) then you have to go to the My Bookmarks page, select the Dashboard radio button then select the Tab and Category. That's a total of 4 clicks and the page also reloads 4 times.
From now you can achieve this with 2 clicks and 1 page load. There is a new menu item "Open in My Bookmarks" under the Category menu (icon gear in the Category caption) on the Dashboard. Click on "Open in My Bookmarks" and the My Bookmarks page will be loaded with the Dashboard and the corresponding Tab and Category already selected.