1) It's possible to multiple select, but clicking
'Delete' will only delete the last selected element.
The remaining selected elements do remain selected and
so clicking 'Delete' again will work again, i.e. only
one element at a time.
2) Would be nice to be able to move or change the order
of elements in the list.
3) Pressing the 'Enter' key doesn't activate the OK
button on any of these dialog windows.