Umm, never even bothered to see if it was doable - the base editor here is redactor. There are some modules that can be edited or added, I'll take a look after my vacation.
Apologies for the delayed reply... we have a solution that's being tested at our .net staging/development site. It may be rolled out in the next maintenance, whch is coming up soon.
Update: Pulled it down for another fix, it's interfering too much with regular posting methods. Working on a different implementation to try and avoid conflicts.