Associate a particular object and DnD type with a
view - so that Gorm knows to initiate a DnD session
with the specified object and type rather than an
archived copy of the view itsself and the default
type (IBViewPboardType).
Releases all the instance variables apart from the
window (which is presumed to release itsself when
closed) and removes self as an observer of
notifications before destroying self.
Method called by GUI builder application when a new
palette has been created and its model (nib/gorm)
has been loaded. Any palette initialization should be
done here.