Fixes #1540

As said in #1540, things like hitting enter on a form that cause a submit that destroy a view remove the handler for the actionId of things like "focusIn".

When the action is triggered and the handler has already been removed it should just be ignored since it's been intentionally removed.

I tested it with rake test[all], and everything was peachy.

I hope you guys pull this, because the error messages are filling up my logs, Thanks!