Allow language specified by the WPLANG constant (but not installed) to be chosen.

fixes #29456.

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Editor scrolling: Avoid jumping to the cursor when modifier and scrolling keys are pressed.

fixes #29485.

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Editor scrolling: Remember and restore scroll position for visual and text modes.

This prevents the editor from jumping off screen when the rendered visual content is significantly taller than plain text, e.g. when there are views present.

This is also a close restoration of 3.9 behavior, some of which was browser-specific.

props avryl.
fixes #29338.

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Language Pack Upgrader: Allow to disable asynchronously translation updates.

* Don't touch VCS installs.
* Use the `async_update_translation` filter (which corresponds exactly to `auto_update_translation`) to entirely disable it, or based on the update offer. 

props nacin, ocean90.
fixes #28571.
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Restore the post type's view_item label for preview links that don't submit the changes.

fixes #28350.
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git-svn-id: http://core.svn.wordpress.org/trunk@29470 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.0-RC2.

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git-svn-id: http://core.svn.wordpress.org/trunk@29471 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Modals: Remove yet more cruft that was causing unwanted coloration of icons.

props celloexpressions.
fixes #29147 (for real this time).

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Editor expand: revert back to scrolling to the editor top when switching Visual to Text, fixes #29338
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git-svn-id: http://core.svn.wordpress.org/trunk@29473 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.0-RC3.

Built from https://develop.svn.wordpress.org/trunk@29699


git-svn-id: http://core.svn.wordpress.org/trunk@29474 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add 'Release Lead' string to credits. see #29494.

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Media: Swap in a new icon for the grid mode.

props melchoyce.
fixes #29353.

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Link to apps.wordpress.org instead of wordpress.org/mobile.

props pento.
fixes #29496.

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git-svn-id: http://core.svn.wordpress.org/trunk@29477 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Media grid details: Load large images instead of originals, if available.

fixes #29498.

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git-svn-id: http://core.svn.wordpress.org/trunk@29478 1a063a9b-81f0-0310-95a4-ce76da25c4cd
i18n: Skip language chooser for localized packages.

Also fixes the install.php welcome string, which was not bring printed.

fixes #29487.

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git-svn-id: http://core.svn.wordpress.org/trunk@29479 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Final about page for 4.0. Enjoy the videos!

props ryelle, melchoyce, smashcut, wonderboymusic, helen.
fixes #29494.

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git-svn-id: http://core.svn.wordpress.org/trunk@29480 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Pinking shears.

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git-svn-id: http://core.svn.wordpress.org/trunk@29481 1a063a9b-81f0-0310-95a4-ce76da25c4cd
About: Make sure the images are properly responsive.

props ocean90.
see #29494.

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git-svn-id: http://core.svn.wordpress.org/trunk@29482 1a063a9b-81f0-0310-95a4-ce76da25c4cd
WordPress 4.0.

Built from https://develop.svn.wordpress.org/trunk@29709


git-svn-id: http://core.svn.wordpress.org/trunk@29483 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Trunk is now 4.1-alpha.

Built from https://develop.svn.wordpress.org/trunk@29712


git-svn-id: http://core.svn.wordpress.org/trunk@29486 1a063a9b-81f0-0310-95a4-ce76da25c4cd
4.1 version bumps.

see [29712], #29537.
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