Revert [28613] and [28664]. A good idea, but too much BC baggage.

See #28099.


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Further adjustments after [8364], listen to an editor instance event instead of delegating a body click when attempting to pause all players belonging to a particular MCE view.

Props avryl.
Fixes #27971.

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git-svn-id: http://core.svn.wordpress.org/trunk@28597 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Cleanup after [28671]:
* Set better defaults in `paginate_links()`, so that themes don't have to calculate them on their own, like Twenty Fourteen does now.
* Don't set page 1 to `?page=1` or `/page/1/` - that will force a canonical redirect.
* Add and cleanup unit tests

Props obenland, SergeyBiryukov, wonderboymusic.
Fixes #24606.

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git-svn-id: http://core.svn.wordpress.org/trunk@28598 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unused globals from `link-parse-opml.php` after [28743].

Props SergeyBiryukov.
Fixes #27881.

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git-svn-id: http://core.svn.wordpress.org/trunk@28599 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Cleanup `wp_widget_rss_form()` after [28734]. "$$input used sanitized variables which contained actual values, unlike $inputs[$input] which in that context contains data about which input fields are hidden."

Props kovshenin.
Fixes #27881.

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git-svn-id: http://core.svn.wordpress.org/trunk@28600 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Reinstate the changes from [28579] with some adjustments:

* Check `! empty( $postarr['file'] )` before calling `update_attached_file()`
* Add a unit test: `test_update_attachment_fields()`
* Run the same logic for empty `guid` for attachments that always ran in `wp_insert_post()`, as per #18310. This fixes a unit test that would have broken when this ticket was marked closed.
* Updated the unit test in `Tests_Media::test_wp_prepare_attachment_for_js()` to account for `url` no longer being empty

Props kovshenin, wonderboymusic.
See #21963.

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git-svn-id: http://core.svn.wordpress.org/trunk@28601 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Whitespace in `navMenuL10n` after [28707].  

Fixes #23076.


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