[Popover] OpenedChangeEvent should not trigger on view initialization

[ma99koch]

Description

When adding a popover to a view, an OpenedChangeEvent for closing the Popover is triggered on view initialization.

Not sure if this is expected behaviour - for me it was not ;)

Expected outcome

OpenedChangeListener of a popover should not be executed when view opens and popover is not visible.

Minimal reproducible example

@Route("popover-opened-listener")
@AnonymousAllowed
public class PopoverOpenedListener extends Div {
	
	private static final long serialVersionUID = 1L;

	public PopoverOpenedListener() {
		Span text = new Span("Click me");
		Popover popover = new Popover(new Div("Popover"));
		popover.setTarget(text);

		popover.addOpenedChangeListener(e -> {
			System.err.println("Popover opened: " + e.isOpened());
		});

		add(text);
	}
}

Output on opening view:

Popover opened: false

Steps to reproduce

1. Create and open view from snippet
2. See console for the output

Environment

Vaadin version(s): 24.5.8 (flow 24.5.9)
OS: Ubuntu 24.04

Browsers

Issue is not browser related