I've just quickly bashed this out so it hasn't been properly tested. Play around with the form and you will see the new implementations. In order for you to select more than one name in the box, hold down the CTRL key and select as many as you want (whilst holding down the key).
Create a backup copyof yours before using mine just in case you find mine too complicated to understand. Or just simply rename mine and test it until you get yourself fully acquainted.
The bits you should work on now is removing the selected item(s) from the list box and the undo bit.
See attached.
Create a backup copyof yours before using mine just in case you find mine too complicated to understand. Or just simply rename mine and test it until you get yourself fully acquainted.
The bits you should work on now is removing the selected item(s) from the list box and the undo bit.

See attached.