Crtl-N creates a new composer window if you're viewing the main evolution 
shell. It would be handy if a new message composer window popped up if you 
were in the midst of writing another email.

I often have a compose window open, but the main evolution shell minimized. 
It is a bit of a pain to have to find the main evoluion window, restore it, 
hit Crtl-N to get a new window, and then re-minimize the evolution shell to 
get it out of the way again. 

It should make sense that the Ctrl-N binding just works, so if I'm in the 
midst of composing a message, and realize I need to fire a different 
message to someone else, I can just pop a new blank message and carry on.

AfC