Patch for multi-select checkboxes instead of single pull-down for the classes

Just wanted to say thanks for this module. It's come in very handy. I thought of using the http://drupal.org/project/menu_attributes module, but I just needed to limit the possibility of selection. I could have modded that other module, but this was simply faster.

I'm not sure if anyone else will need this, but I've rolled a patch file for those who might be interested in this. Not, I've had to drop the single select option. I could code a version with both options available on a toggle within a definition set, but I just didn't have the time.

I hope this helps some out there.