If an element under the sway of persist_helper makes use of @command, poke the corres...

If an element under the sway of persist_helper makes use of @command, poke the corresponding <command> with an event if needed, and add a special event listener to it for monitoring the state of the original element.

So basically, this will work now:

    <checkbox id="foo" oils_persist="checked" command="cmd_foo" />

git-svn-id: svn://svn.open-ils.org/ILS/trunk@14330 dcc99617-32d9-48b4-a31d-7c20da2025e4