apply container background widgets [needs Xcode 15]

[brindy]

Task/Issue URL: https://app.asana.com/0/414709148257752/1205862739369423/f
Tech Design URL:
CC:

Description:

When building with Xcode 15 the widgets require a container background.

Steps to test this PR:

1. Build and run the app using Xcode 15
2. Add all the widgets to the Home Screen and confirm they render correctly
3. Add Lock Screen widgets and confirm they render correctly

[samsymons]

The changes here look good, and in the simulator this looks good, but for some reason all widgets are blank on a physical device, even after rebooting. Are you seeing the same thing @brindy?

[brindy]

It definitely worked when I first did it. Just going to try on Xcode 15.0.0 locally. Maybe it's the point release has broken it?

Edit: Yep - "works for me" on Xcode 15 and Xcode 15.0.1 🤷

[brindy]

Gave them a quick test with Xcode 15.1 and still good.