[Update] Address FeatureFormView deprecation warning

[yo1995]

Description

This PR fixes a deprecation warning in FeatureFormView sample.

Linked Issue(s)

• FeatureFormView - Revise init changes, maintain deprecated init behavior arcgis-maps-sdk-swift-toolkit#1201
• swift/issues/7029

How To Test

Run the sample and ensure…

• UI still works on Mac Catalyst
• The form is presented as normal/same behavior as the floating panel

Screenshots

Before	After

To Discuss

• After the change we can see that the title of the form "Feature Form Places" has an additional "X" button to its right. Is it expected? 🤔 (seems expected per here (FeatureFormView - Revise init changes, maintain deprecated init behavior arcgis-maps-sdk-swift-toolkit#1201 (comment)))

[dfeinzimer]

This can probably also close Swift 7029.

[dfeinzimer]

After the change we can see that the title of the form "Feature Form Places" has an additional "X" button to its right. Is it expected? 🤔

Yes, expected, however I'd say the header now looks confusing with the close button, discard button and submit button. 🤔 I think the discard button can go away entirely, as that's built into the form now. As for the submit button, we might want to look at other options for where to place it.

[dfeinzimer]

When using the new built-in close button, the selected feature stays selected.

I think the sample will need some more structural changes given the new save and discard functionality built into the component.

What if we got rid of featureFormToolbar entirely and placed the apply edits button into a toolbar item only visible after the form has been closed?

[yo1995]

Thanks, I'll toy with the UI a bit and see what I can get… back into draft

[dfeinzimer]

Looks good!

[yo1995]

Thanks. I'll update the sample design accordingly.