Pop up this menu and return the result of sending to the target object
the selector corresponding to the menu item selected by the user. Return
nil if no item is selected.
Construct a menu from anArray. The elements of anArray must be either:
* A pair of the form: <label> <selector>
or * The 'dash' (or 'minus sign') symbol
Answer an instance of me whose items are in labels, with lines drawn
after each item indexed by linesArray. Labels can be either a string
with embedded CRs, or a collection of strings.
Answer an instance of me whose items are in labels, with lines drawn
after each item indexed by linesArray. Labels can be either a string
with embedded CRs, or a collection of strings. Record the given array of
selections corresponding to the items in labels.