This class defines a console frame.
The standard console menu bar is created (with the usual ``File'' and ``Edit'' menus). If close? is #t, then a ``Close'' menu item is included. (``Quit'' is always present.) A welcome message is inserted into the instance of mred:console-edit% (that is created by the initialization function in mred:simple-menu-frame%) unless msg is #f. Finally, the buffer is sent the messages initialize-console, enable-autoprompt, takeover-output, and insert-prompt.