Put Mentorhelp on F2

[Dabir]

I know F2's already being used for screenshots but that can just go on F3 or something, there's plenty of Fs to give.

My reasoning is it can be quite hard to pick out one verb from the clusterfuck of verbs that may or may not be available at any one time. Mentorhelp is so similar to adminhelp that I think it should have a similar keyboard shortcut.