[Blazor] Add support for onclose event for dialog

[macias]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

Please add support for onclose event for dialog element the same way you support for example onclick for buttons.

Describe the solution you'd like

Support for onclose, so one could write

<dialog @onclose="...

Additional context

No response

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.