Updated about page screenshots with more colors, updated typography shot, simplified hero screenshot of desktop browser. See #26387.

git-svn-id: https://develop.svn.wordpress.org/trunk@26775 602fd350-edb4-49c9-b593-d223f7449a82
Core updates for the new color schemes.
 * Update about page, there's now 8.
 * Display them four wide, not three, and ensure adequate spacing.
 * Use a dedicated nonce.
 * Push Light to the front in addition to Default.
 * Use user-profile.js on about.php. A few extra things are initialized but they are harmless.

see #26468, #26387.


git-svn-id: https://develop.svn.wordpress.org/trunk@26776 602fd350-edb4-49c9-b593-d223f7449a82
Freedoms/Credits: Allow for big first paragraphs, overridden by the font-size change in [26719]. Reduced slightly to prevent wrapping on freedoms.

see #26387.


git-svn-id: https://develop.svn.wordpress.org/trunk@26777 602fd350-edb4-49c9-b593-d223f7449a82