Don't switch contextual help tabs when tabbing around. props neil_pie. see #28209.

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git-svn-id: http://core.svn.wordpress.org/trunk@28669 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove title attributes in `wp_authenticate_username_password()`.

Props joedolson.
Fixes #26547.

Built from https://develop.svn.wordpress.org/trunk@28870


git-svn-id: http://core.svn.wordpress.org/trunk@28670 1a063a9b-81f0-0310-95a4-ce76da25c4cd
In deprecated media iframe code, `attachment_fields_to_save` filter should not be called twice after initial image upload in post.

Props SergeyBiryukov.
Fixes #20720.

Built from https://develop.svn.wordpress.org/trunk@28871


git-svn-id: http://core.svn.wordpress.org/trunk@28671 1a063a9b-81f0-0310-95a4-ce76da25c4cd