Currently, the only way to sort the items in "Manage Dashboards" is a manual drag & drop. By default, they're ordered by when a user gained access, but it would be nice if each user could set it to automatically sort alphabetically by name.
For admins, using drag & drop can be very tedious and time consuming. I have access to 277 pages/dashboards, which is well beyond my ability to manage with the current settings.