In OL03, I was able to change the account to send a message with Alt+N
followed by the number. Now, it seems, the shortcut is Alt+H,Y,1 followed by
the number.

Similarly, to send a message, I would use Alt+S. Now I have the choice of
Alt+H,S or Alt+F,E. (Or Ctl-ENTER, I suppose.)

Is there anything I can do to make OL07 use shorter shortcuts?