STUN - needs to be mapped to a single keystroke ?

[mbv]

Anybody else finding the Stun option really fiddly to use ? Because its only available as an action you have to scroll down a list of options to get it to work and this is really difficult on the Hard or Extreme levels where you have very little time before you are recognised, even when sneaking. It would be really useful if stun could just be mapped to a single keystoke - perhaps one of the spare number keys - so that when you are close enough a quick key press does the job.