Andrea Fercia 340fd28d82 Accessibility: Improve focus management in the Media Views.
- keeps focus management only where necessary to avoid focus losses
- removes focus management where a specific user workflow was assumed
- makes the "Attachment Details" navigation buttons really disabled when there are no next or previous attachments
- adds inline comments to clarify all the usages of focus()

Fixes #43169.

Built from https://develop.svn.wordpress.org/trunk@45524


git-svn-id: http://core.svn.wordpress.org/trunk@45335 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2019-06-12 21:03:52 +00:00
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2018-06-28 02:35:44 +00:00