Apply filter to entire dashboard

[#1]

Sometimes you create a dashboard completely related to one particular tracking code (for example a TV ad code). To do this you create a few reportlets filtered on this particular campaign code. Next you want a separate dashboard for another campaign code. Right now, you would need to copy this dashboard and then edit all the reports to change the filter. It would be nice if there was a way to apply one filter to a dashboard so that when you copy you just need to change that filter once.