[MlMt] Doc: keybindings customization

[Kai Großjohann]

Hi,

it's a little fascinating that the keybindings are extremely well 
documented, so that I didn't have any real issue.  I stumbled across 
something really simple:

I created my own keybindings and named them "Kai".  In there, I changed 
the meaning of one of the Gmail keys.

So do I have to write "Gmail,Kai", or do I have to write "Kai,Gmail" in 
the "Custom Keybindings" textbox in the preferences?  I used 
"Kai,Gmail,Kai" :-)

Kai