Hey Jake, thanks for submitting this request. We've noted your request, but I wanted to take the opportunity to let you know of a couple of ways you could handle this right now, just not as a discrete feature you've described.
The first way being target lists. I actually keep a target list of computers I routinely deploy tests to here internally.
There's a shortcut here not everyone may be aware, if you drag and drop a Package to the Target List in the tree, or vice versa, it will open a deploy once window for that Package and those Targets.
There is also the option to
Remember these targets for next time, on the Deploy Once window.