Auto-insert name after </# and </@

It would be very handy if <#/ auto-inserts the name of directive that it closes. It's tricky to do though, because it has to be synchronous (and fast) and so it certainly can't wait for the result from the reconciler thread. Without that, finding out what tag needs closing isn't trivial because most but not all # directives are implicitly closed (worse, in case of assignments that depends on the expression after the directive name).