Updates to the About page:

- Better screenshots
- Align screenshots with the dividers between sections
- Increase body text size
- Add a mention of Twenty Fourteen by name
- i18nalize 'Now with more color'
- Replace &rsquo; with &#8217;

See #26387.


Built from https://develop.svn.wordpress.org/trunk@26719


git-svn-id: http://core.svn.wordpress.org/trunk@26608 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Slight adjustment to centered headlines in About page. See #26387.
Built from https://develop.svn.wordpress.org/trunk@26720


git-svn-id: http://core.svn.wordpress.org/trunk@26609 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Switch this header on the ABout page from title case to sentence case to match the style of all other headers on the page. See #26387.
Built from https://develop.svn.wordpress.org/trunk@26721


git-svn-id: http://core.svn.wordpress.org/trunk@26610 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add icon to the help button in distraction-free writing.

props ocean90.
fixes #26450.

Built from https://develop.svn.wordpress.org/trunk@26722


git-svn-id: http://core.svn.wordpress.org/trunk@26611 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Un-translate all of the about page strings so translators don't start working on incomplete copy. see #26387.

Built from https://develop.svn.wordpress.org/trunk@26723


git-svn-id: http://core.svn.wordpress.org/trunk@26612 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Use p.description instead of <small> on the discussion settings page. see #26441.

Built from https://develop.svn.wordpress.org/trunk@26724


git-svn-id: http://core.svn.wordpress.org/trunk@26613 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Map old -width theme tags to new -layout tags for the purposes of translation in the admin.

see #21442.

Built from https://develop.svn.wordpress.org/trunk@26725


git-svn-id: http://core.svn.wordpress.org/trunk@26614 1a063a9b-81f0-0310-95a4-ce76da25c4cd
No-JavaScript and no-Customizer support for the new Themes screen.

JavaScript is rarely disabled, but graceful degradation is still important. For example, syntax errors can occur, usually with major WP updates that overhaul entire experiences and update external libraries combined with themes or plugins doing weird or old things. If this error is due to their current theme, a user needs to be able to access the themes screen to switch away from the theme. A more subtle issue could make things painful to diagnose.

This commit renders the grid in PHP (the template is duplicated, but it lightweight, fairly mundane, and easy to sync). On Backbone render, the grid is then re-rendered from JavaScript so searches can occur. Customize and Live Preview is disabled if JS fails to kick in. If JS is disabled, old-school "Preview" links are displayed.

No-Customizer support: The customizer is only supported when the browser supports postMessage (IE8+), and if the frontend is a different domain, CORS (IE10+). We use the .hide-if-no-customize class for this. Pre-customize "Preview" links should use .hide-if-customize.

The .load-customize class should be used to declare a link that opens the customizer. This enables customize-loader.js to intercept this link and load the customizer on top of the current window, making for a smoother experience.

fixes #25964.

Built from https://develop.svn.wordpress.org/trunk@26726


git-svn-id: http://core.svn.wordpress.org/trunk@26615 1a063a9b-81f0-0310-95a4-ce76da25c4cd
POT file update for Twenty Fourteen. see #26437.

Built from https://develop.svn.wordpress.org/trunk@26727


git-svn-id: http://core.svn.wordpress.org/trunk@26616 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Remove screenshotGallery. see #25948.

Built from https://develop.svn.wordpress.org/trunk@26728


git-svn-id: http://core.svn.wordpress.org/trunk@26617 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fourteen: Remove unused and untoggled no-js class.

props johnbillion.
fixes #26453.

Built from https://develop.svn.wordpress.org/trunk@26729


git-svn-id: http://core.svn.wordpress.org/trunk@26618 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: Set a max-width on screenshots so they don't get blurry at very wide screen widths.

props matveb.
fixes #26172.

Built from https://develop.svn.wordpress.org/trunk@26730


git-svn-id: http://core.svn.wordpress.org/trunk@26619 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add back CSS rules for RTL resize handles.

Disable CSSJanus' swapLtrRtlInUrl option, as we currently don't use it otherwise (and it breaks this if left on).

props ocean90.
fixes #26449.

Built from https://develop.svn.wordpress.org/trunk@26731


git-svn-id: http://core.svn.wordpress.org/trunk@26620 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation fixes for `wp_heartbeat_set_suspension()`.

See #25073.

Built from https://develop.svn.wordpress.org/trunk@26732


git-svn-id: http://core.svn.wordpress.org/trunk@26621 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Ensure that disabled select elements are distinguishable from normal ones. Fixes #26456, props TobiasBg.


Built from https://develop.svn.wordpress.org/trunk@26733


git-svn-id: http://core.svn.wordpress.org/trunk@26622 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Core updates: Explicitly call wp_cache_delete() after a DB upgrade, as not all cache backends allow the entire backend to be flushed.

props dd32.
fixes #26173.

Built from https://develop.svn.wordpress.org/trunk@26734


git-svn-id: http://core.svn.wordpress.org/trunk@26623 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Add new fit-content rules to accompany intrinsic width on adminbar dropdown wrappers. Fixes #26430, props Jayjdk.
Built from https://develop.svn.wordpress.org/trunk@26735


git-svn-id: http://core.svn.wordpress.org/trunk@26624 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation fixes for hooks and functions introduced in 3.8.0.

Built from https://develop.svn.wordpress.org/trunk@26736


git-svn-id: http://core.svn.wordpress.org/trunk@26625 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Updates to the About page:

* A live color scheme preview
* Replace the hard-coded version number
* Copy edits
* New screenshots
* Size adjustments to the header and WP badge
* Capitalize 'Open Sans'

See #26387, props markoheijnen, ryelle, siobhan, melchoyce.


Built from https://develop.svn.wordpress.org/trunk@26737


git-svn-id: http://core.svn.wordpress.org/trunk@26626 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Themes: If a theme only has a very-old-school 300px-wide screenshot (or narrower), don't stretch it.

props matveb.
fixes #26459.

Built from https://develop.svn.wordpress.org/trunk@26738


git-svn-id: http://core.svn.wordpress.org/trunk@26627 1a063a9b-81f0-0310-95a4-ce76da25c4cd