Hidden CanvasItem problem (TestCase)

[pH4Lk0n]

Hello,

I've come across a problem with hidden CanvasItem on FF18.
When item is showing it all looks ok but when it's hidden height of DynamicForm grows drastically.

Here is a test case:

DynamicForm form = new DynamicForm();
form.setBorder("1px solid red");

MyCanvasItem test1 = new MyCanvasItem("test1");
		
MyCanvasItem test2 = new MyCanvasItem("test2");
[B]test2.setVisible(false);[/B]
		
form.setFields(
	test1,
	test2
);

public class MyCanvasItem extends CanvasItem {
	public MyCanvasItem(String name) {
		super(name);
			
		setInitHandler(new FormItemInitHandler() {
			public void onInit(FormItem item) {
				Label label = new Label("test");
				setCanvas(label);
			}
		});
	}
}

Tested on several nightly versions (including 2013-01-29).
Regards
Mariusz Goch