Address NoticePresenter iPad rotation workaround

[megmil]

Fixes #11900

To test: Reproduce steps in #11345

iPad Air Simulator	iPhone 15 Simulator

Description

New solution for bug in #11345 (Fix Notices showing anywhere but the bottom on iPad devices)

Regression Notes

1. Potential unintended areas of impact
   Notices on iPhone
   Split view

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Tested on iPhone 15 simulator

3. What automated tests I added (or what prevented me from doing so)
   N/A

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Testing checklist:

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[megmil]

@justtwago @dvdchr @guarani @wargcm Could someone review this or let me know if there's any other steps to complete before this can be looked at?

[guarani]

Hi @megmil, thanks for your contribution!

I couldn't reproduce the issue with the notices disappearing on the iPad. The notices appear if I go to Posts or Pages and turn off the internet. As I rotate the device's orientation, the notices work as expected (they move so they're always at the bottom of the screen, no matter the orientation). I'm testing on a physical iPad 8th generation (iPadOS 16.3).

Could you please verify the issue is present on the latest trunk commit? If so, please file an issue with steps to reproduce.

Fixes #11900

Just a note: this should point to an open issue, not a PR.

[megmil]

Hi @guarani! The issue isn't the notices disappearing on iPad (anymore)--that was fixed in #11345. However, the fix in #11345 was a workaround "hack", and Apple engineers recommended a different way to fix it, according to #11900. That's what I implemented here.

My bad with the PR/bug thing. I just saw that it was marked as "Good First Issue."