Todo Item intent: `doneEdit` action is fired twice on `keyup:enter`

Hi,
At this point

todomvc-cycle/src/components/TodoItem.js

Lines 23 to 27 in 2692a07

    
             DOM.select('.edit').events('keyup') 
        
               .filter(ev => ev.keyCode === ENTER_KEY) 
        
               .merge(DOM.select('.edit').events('blur', true)) 
        
               .map(ev => ({title: ev.target.value, type: 'doneEdit'})) 
        
           )

keyup
and blur are fired when ENTER key is pressed. That way the model is written two times to localstorage.

How can we ignore blur event when keyup:ENTER is fired?
This should be done on intent or on model?

Sorry, I'm still learning RxJS.

	DOM.select('.edit').events('keyup')
	.filter(ev => ev.keyCode === ENTER_KEY)
	.merge(DOM.select('.edit').events('blur', true))
	.map(ev => ({title: ev.target.value, type: 'doneEdit'}))
	)