TinyMCE: fix the tooltip for 'alignnone' button on the image toolbar. Props johnbillion, see #30147.
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git-svn-id: http://core.svn.wordpress.org/trunk@30382 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: fix non-responsive layout in IE8. Props phpmypython, fixes #24194.
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git-svn-id: http://core.svn.wordpress.org/trunk@30383 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: improve post thumbnail HTML output.

 * Add `aria-hidden` attribute to reduce verbosity on archive pages.
 * Add alt text in archives to avoid confusing link texts, see #30076 for context in Twenty Fifteen.

Props hiwhatsup, joedolson. Fixes #30144.
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git-svn-id: http://core.svn.wordpress.org/trunk@30384 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Making the sidebar sticky for everyone. When we have a long sidebar, let it scroll with the content, but fixing the sidebar and no longer scrolling when we get to the end of the sidebar content. Scroll up and the sidebar starts scrolling up to, eventually staying fixed when it gets back to the top.

Props celloexpressions, avryl, fixes #30366.



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git-svn-id: http://core.svn.wordpress.org/trunk@30385 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: replace ellipses appended to automatically generated excerpts with both ellipses and a "Continue Reading" link to meet accessibility-ready requirements.

Props davidakennedy, lancewillett. Fixes #30176.
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git-svn-id: http://core.svn.wordpress.org/trunk@30386 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Thirteen: replace ellipses appended to automatically generated excerpts with both ellipses and a "Continue Reading" link to meet accessibility-ready requirements.

Props davidakennedy, lancewillett. Fixes #30178.
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git-svn-id: http://core.svn.wordpress.org/trunk@30387 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Check if we're in the customizer before we avoid outputting HTML for an empty tagline. Avoids an issue with a not-updating customizer preview of the tagline if you're going in with an empty tagline.

Props philiparthurmoore, celloexpressions, fixes #30358.


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git-svn-id: http://core.svn.wordpress.org/trunk@30388 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Accessibility: hide admin menu separators from screen readers.

props afercia. fixes #30010.

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git-svn-id: http://core.svn.wordpress.org/trunk@30389 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: doc cleanup, addresses removing periods from file header summaries, some spacing, loop documentation, and https instead of http.

Props DrewAPicture, MikeHansenMe, see #30149.


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git-svn-id: http://core.svn.wordpress.org/trunk@30390 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Slide the admin menu out to the right when DFW mode kicks in and RTL is in use.

Fixes #30356
Props yoavf

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git-svn-id: http://core.svn.wordpress.org/trunk@30391 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Introduce two new filters to the post revisions screen:

 * `process_text_diff_html` for contextually filtering a diffed line. Allows for the line to be processed in a different manner to the default `htmlspecialchars`.
 * `revision_text_diff_options` for filtering the options passed to `wp_text_diff()` when viewing a post revision.

Fixes #24908
Props adamsilverstein

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git-svn-id: http://core.svn.wordpress.org/trunk@30392 1a063a9b-81f0-0310-95a4-ce76da25c4cd
TinyMCE: update to the latest dev. version, 4.1.6+. Fixes #30411.
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git-svn-id: http://core.svn.wordpress.org/trunk@30393 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: escaping here breaks color schemes.

Props celloexpressions, iamtakashi, fixes #30409.



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git-svn-id: http://core.svn.wordpress.org/trunk@30394 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Removing unneeded CSS from RTL causing odd hover effects.

Props yoavf, iamtakashi, fixes #30360.



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git-svn-id: http://core.svn.wordpress.org/trunk@30395 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WPDB: Force `STRICT_ALL_TABLES` to be enabled as soon as we connect to the MySQL server.

This improves data integrity when inserting and updating rows in the database, particularly when trying to insert emoji into posts stored with character sets that don't support emoji.

See #21212.

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git-svn-id: http://core.svn.wordpress.org/trunk@30396 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Return an empty array from `get_approved_comments()` when `$post_id` is empty.

This behavior was broken when moving the internals to `WP_Comment_Query` in
[30098]. As a result, `get_approved_comments( 0 )` was fetching *all* approved
comments, causing performance issues.

Props dd32.
Fixes #30412.
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git-svn-id: http://core.svn.wordpress.org/trunk@30397 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Apply a filter to the `<script>` tag for enqueued scripts in the same way a filter is applied to the `<link>` tag for enqueued styles.

Fixes #13592
Props quietnic, MikeHansenMe

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git-svn-id: http://core.svn.wordpress.org/trunk@30398 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Prevent wpmu_delete_blog from removing the wrong uploads directory

`wp_upload_dir()` includes some logic to fall back to the default site's upload directory if a specific directory for the requested site cannot be found. Because of this, if `wpmu_delete_blog()` is fired twice in a row for the same site, the main site's upload directory could be deleted as well.

This adds some checks in `wpmu_delete_blog()` so that we are confident in the site and it's upload directory's existence before dropping the site. Tests are added for when `ms_files_rewriting` is enabled or disabled.

Fixes #30121

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git-svn-id: http://core.svn.wordpress.org/trunk@30399 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Bump the $wp_version.
This version string controls more than you might first imagine, but the important thing to note for now, is that this needs to contain a revision number in order for nightly builds to include a revision number.
If a nightly build doesn't include a revision number, Background Updates won't occur for Development users (after all, 4.1-beta1 == 4.1-beta1, which is already installed).
See #30405

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git-svn-id: http://core.svn.wordpress.org/trunk@30406 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use hash_equals() for old md5 hashes.

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git-svn-id: http://core.svn.wordpress.org/trunk@30407 1a063a9b-81f0-0310-95a4-ce76da25c4cd