Auto correct toggle?

I do mostly technical writing, so about 80% of the time Auto correct is useful, (there are lots of regular words between the jargon), but sometimes, it is a real pain. For example, when typing passwords! Having them changed is a big problem. Also occasional technical words that won’t be repeating, so don’t need to be added to the dictionary.

Is there any way to add a shortcut key or toolbar icon to toggle the feature? Will that feature be enabled for Version 3? Forcing me to go to options ( which I can add to the toolbar), then corrections, then check it, really makes me just disable auto-correct even though I’d like to have it.