Add popup related navigation extension methods

[jamesbrooksbank]

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 [https://github.com/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/Update to document for extension IsDestinationPageACommunityToolkitPo… MicrosoftDocs/CommunityToolkit#605]

Additional information

Tested on Android.

[jamesbrooksbank]

@dotnet-policy-service agree

[TheCodeTraveler]

Thanks @jamesbrooksbank!