Area patrol toggle/widget?

I have problems with dividing my attention. I love RTS games, since they appeal to my sense of watching great big armies crash into eachother, but often times my attention is so occupied elsewhere that I can't attend to some units sitting in some corner that would be better off securing an area of the map.
What I'd really like to see is some basic command or widget that orders a unit to patrol to random points within an area, letting me focus my attention elsewhere while it does its thing.

On a semi-related note, it seems that factories are able to order newly produced units to patrol but no such option exists in the factory's orders tab unless an actual unit is selected.

Enderspoons factories have build tabs similar to constructors. all factories default to the units tab when you select them but if you click on the commands tab you can queue commands that would be given to all units from that factory

A widget to do this would be a little complicated. simply making idle units patrol around their surrounding isn't that hard, but it has many problems, trying to solve them would eventually make the widget into just an AI player.