Changed 'enter' so that it ONLY asks for a recipient when in mail.

Changed 'enter' so that it ONLY asks for a recipient when in mail.
Changed goto so that it no longer deletes the message window when clicked
on.  This results in a potential infinitate number of room menus, which
I'll fix when I have time.  This was the ONLY instability.  Previously
clicking on goto (in the menu, the arrow button OR the 'goto' button) more
than once would cause the program to crash.  That's no longer the case.
The *ix version is now stable.

Fixed various problems in the MSW version, which will be released only in
executable form when stabilized.