Allow toggling between contact filter and "Show All"

It would be nice to be able to toggle back and forth between the full view of contact notes and a specialized filter set up.  As it is now, once you leave the specialized filter (which is the open up default) to look at the full list, the only way you can get back to the specialized view is to log out and log back in.  Better yet might be to have the ability to save several specialized filters, and to of course have the toggle back and forth ability.