sproutcore20 simple question

app.js

// mouseLeave is not called when moving the mouse cursor between task. How to do it? 
// I would expect it to fire a mouseleave event when going to another task and fire 
// a mouseenter in that recently entered task element. That's not what is happening.

(...)

Todos.todosList = SC.CollectionView.extend({
	contentBinding: "Todos.todosController",
	
	mouseEnter : function(e)
	{
		$(e.target).addClass("showControls");
	},
	mouseLeave : function(e)
	{
		$(e.target).removeClass("showControls");
	}
});

index.html

(...)
{{#collection Todos.todosList contentBinding="Todos.todosController" tagName="ul" itemClassBinding="content.isDone"}}
		{{view SC.Checkbox titleBinding="parentView.content.title" valueBinding="parentView.content.isDone"}}
                <div class="controls">
         		{{#view SC.Button target="Todos.todosController" action="removeTodo"}}Remove{{/view}}
                </div>

{{/collection}}
(...)