Twenty Fifteen: a shorter header on small screens when there is no header text or header image looks more correct.

Props iamtakashi, fixes #30326.



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Twenty Fifteen: pinching to zoom in on landscape on iPads is breaking the layout with the sticky sidebar. Providing a one-column view on those screens looks good and will likely prevent other bugs we don't even know about.

Props iamtakashi, fixes #30366.



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Twenty Fifteen: prevent too-wide tables from popping out of posts.

Props iamtakashi, fixes #30420


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Twenty Fifteen: remove unneeded custom header admin callbacks.

Props philiparthurmoore, fixes #30432.


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Update Akismet external in trunk to 3.0.3.


git-svn-id: http://core.svn.wordpress.org/trunk@30557 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: correct number of menus used in comments

Props jeherve, see #30149


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Twenty Fifteen: docs correction and cleanup.

Props DrewAPicture, see #30149.


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Twenty Fifteen: make sure the 'says:' in comments is readable by a screen-reader.

Fixes #30479.


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Twenty Fifteen: update the .pot file.

Props iamtakashi, fixes #30433.


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Twenty Fifteen: docs correction.

Props rachelbaker, DrewAPicture, fixes #30456


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Editor:
- Add CSS reset for the TinyMCE fullscreen mode when used on the Edit Post screen.
- Fix loading of the old and new DFW buttons, use another arg. passed to WP_Editors.
- Reset editor-expand when exiting TinyMCE fullscreen mode.
Fixes #30453.
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git-svn-id: http://core.svn.wordpress.org/trunk@30563 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Editor: add a pointer for the new DFW button. Remove the wp350_media and wp360_revisions pointers from the same screens. See #30458.
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Fix the PHPDoc example for _split_str_by_whitespace().
Props voldemortensen. Fixes #30504

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Type cast `$nonce` to string in `wp_verify_nonce()`.

props jesin.
fixes #29542.
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Remove the `wp_is_trusted_network()` function pending further discussion on terminology and behaviour.

See #30145

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Network Admin: Improve width of input fields on Add New Site and Edit Site screens.

props honeysilvas.
fixes #16383.
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Comments: Use proper HTTP response codes for validation errors.

props miqrogroove, solarissmoke, mackensen.
fixes #11286.
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git-svn-id: http://core.svn.wordpress.org/trunk@30569 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Fix DocBlock formatting for `wp_generate_password()`.

Props stevegrunwell for the initial patch.
Fixes #30509.

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git-svn-id: http://core.svn.wordpress.org/trunk@30570 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove unbounded check for "install.php" in `wp_not_installed()`.

The check is true for `wp-admin/plugin-install.php` and `wp-admin/theme-install.php` too. This will end in a redirect to `/wp-admin/upgrade.php` or a screen with a bunch of errors.
The `WP_INSTALLING` constant was added in WordPress 1.5.1 to `wp-admin/install.php` which makes the check for "install.php" redundant.

props joemcgill.
fixes #29694.
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Remove old DFW width adjustment help text.

fixes #30517
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