Add a confirm dialog for the "Restore default layout" buttom on Lobby: Dashboard

[raydoom]

Important notices

Before you add a new report, we ask you kindly to acknowledge the following:

• [x] I have read the contributing guide lines at https://github.com/opnsense/core/blob/master/CONTRIBUTING.md
• [x] I am convinced that my issue is new after having checked both open and closed issues at https://github.com/opnsense/core/issues?q=is%3Aissue

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

Describe the solution you like Add a confirm dialog for the "Restore default layout" buttom on Lobby: Dashboard，for prevent misclick.

Describe alternatives you considered

Additional context

[Monviech]

For me it seems to show one, I'm on the 24.7 R2:

Relevant commit: https://github.com/opnsense/core/commit/68ec1d79b7eb80d747b763470cc71b158960887c

[raydoom]

I am on OPNsense 24.7.b_215-amd64

[raydoom]

Only a beta version bug.