The user can now customize their dashboard by dragging and dropping widgets to move them around.

I opened Review Board on two different browsers, Chrome and Firefox, and logged in as the same user on both browsers. On the Chrome browser, I visited the admin dashboard and changed the ordering of the widgets with drag-and-drop. On the Firefox browser, I also visited the admin dashboard, and I checked to make sure that the positions of the widgets were the same on both browsers, indicating that the positions had been saved on the back end side.