> will this focus at the end of the editable ?

This will put the focus in the last element, only if that element is currently an editable element (this is for taps to the right) and only if the target was on the list and not a recipient element.

> should we use lastElementChild ?
> can't you use what is returned by this.last instead of lastChild ? (should cache it in a local variable)

I've done the latter...

Fixed in new commit