I'd like to hook up the action where the user presses DELETE key at the end of one child, which deletes its next-sibling. I can't seem to capture this event no matter what I try. Any ideas?
(The goal is that when I press DELETE at the end of the child, the child gets concatenated (say, the child is just a node with a string property) with the next-sibling instead of just deleting the next sibling. Similarly when I press BACKSPACE at the beginning of a child, it concatenates with the prev-sibling. I can do the BACKSPACE part by hooking up the DELETE action in the action map, but I can't do the DELETE part.)