Implement extension method for NavigatedFromEventArgs

[JamesBrooksbankIceland]

From parent page when calling a popup, when the onnavigatedfrom event, check args if the destination is a popup page.

Unit tests implemented

Sample code applied

Description of Change

Added an extension method to OnNavigatedFrom event which checks if the destination page is a popup and if so returns true.

Linked Issues

• Fixes Extend NavigatedFromEventArgs from OnNavigatedFrom to allow determine if DestinationPage is Popup #2927

PR Checklist

• Has a linked Issue, and the Issue has been approved(bug) or Championed (feature/proposal)
• Has tests (if omitted, state reason in description)
• Has samples (if omitted, state reason in description)
• Rebased on top of main at time of PR
• Changes adhere to coding standard
• Documentation created or updated: https://github.com/MicrosoftDocs/CommunityToolkit/pulls
  Update to document for extension IsDestinationPageACommunityToolkitPo… MicrosoftDocs/CommunityToolkit#605

Additional information

Tested on Android.

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[bijington]

@JamesBrooksbankIceland This generally looks good, thank you for it! Only one comment in the code. I have a question outside of the changes though. Could/should we also introduce an extension to know whether we are navigating from a popup? I think it could be of benefit but keen to hear from others

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[TheCodeTraveler]

Thanks @JamesBrooksbankIceland!

Could you please agree to the dotnet service policy allowing us to merge this PR?

This policy only requires approval from you; it is just optional to also request from the company you work for. The work you contribute to this open-source project are your own and independent from the work you contribute to your company.

[jamesbrooksbank]

Unfortunately i have been told by our legal department that i cannot proceed to give permission. They have enabled to submit via my own personal account. Rather silly from my perspective but i could do with some guidance.... i have redone the work locally on my own pc in my own time, and ready to create that PR. Could you advise how to close this pr and if it will be a problem. I'm very sorry for making my first submission a mess up.