moai.DoMethod(id, "EndModal", retval[, nodestroy])
retval will be the return value
of the call to this dialog's Dialog.ShowModal method then. This value is often used
to indicate success or failure, i.e. you could return True in case the user pressed the "OK" button,
and False otherwise.
Additionally, this method will automatically destroy the dialog, i.e. it will implicitly
call moai.FreeDialog() on the dialog object. If you don't want
this, you have to set the optional argument nodestroy to True. However, it is recommended
and it is good programming practice to destroy every dialog as soon as you are finished
with it. See Dialog class for details.
True if this method shouldn't automatically destroy the dialog
(defaults to False which means destroy the dialog after closing it)