Update Post Editor context menu to use new style and update copy

[kean]

Fixes #11994:

• Update the "More" menu in the editor to use the modern iOS look (easier to reach, can be used with a single gesture, has images to make it easier to find what you need)
• Update some copy to match Gutenberg (they should not invent its own undocumented terminology):
  • "Switch to HTML Mode" → "Code Editor"
  • "Switch to Visual Mode" → "Visual Editor"
  • "History" → "Revisions (%i)"
• Update the copy in the "Revisions" screen to replace "History" with "Revisions"
• Update table view style in the "Revisions" screen to "insetGrouped".

To test:

• ✅ Verify the changes according to the acceptance criteria listed in the description

Known Issues

• ⚠️ "Content Structure" is not immediately available – seems to be an existing issue

Regression Notes

1. Potential unintended areas of impact: Post Editor
2. What I did to test those areas of impact (or what existing automated tests I relied on): manual
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)

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	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr23145-54b6b93
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	App Center Build	WPiOS - One-Offs #9799

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[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23145-54b6b93
	Version	24.8
	Bundle ID	com.jetpack.alpha
	Commit	54b6b93
	App Center Build	jetpack-installable-builds #8845

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[momo-ozawa]

Looks great! A few nitpicks:

• Can you remove the separator for the section header in the revisions screen?
• Wdyt of using the same date format for the "post created on ..." footer?

[kean]

Can you remove the separator for the section header in the revisions screen?

No idea how I missed it – fixed.

Wdyt of using the same date format for the "post created on ..." footer?

I updated the format to .medium and also removed it for drafts – as was discussed before, dateCreated doesn't mean what it's supposed to mean for drafts. Even on the screenshot you provided, it was incorrect.