This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
and add selection traversal callbacks so context-sensitive behavior can
even be implemented for individual menu items. These work around the two
largest issues holding me back with some of my sysinstall changes.
