To return true means that this object can show bevelled borders, and
therefore can accept, eg, #raised or #inset as valid borderColors.
Must be overridden by subclasses that do not support bevelled borders.
Copy all of my instance variables. Some need to be not copied at all,
but shared. Warning!! Every instance variable defined in this class
must be handled. We must also implement veryDeepFixupWith:.
See DeepCopier class comment.
Add morph-specific items to the given menu which was invoked by the given hand. This method provides is invoked both from the halo-menu and from the control-menu regimes.