Ability to administer dashboards for non-current users

For the currently logged in user, it is possible on the user's profile page to manage their dashboards.

Admin should be able to do this for non-current users,

If we want a customer to see a dashboard, it would be silly to give them long steps on how to find, subscribe, and customize my dashboard. As it stands I can't even be sure if internally everyone is seeing the improvements I make to the default dashboard and I hope they haven't started customizing theirs yet or they won't get the improvements we have setup.