Add additional color schemes back into core

[melchoyce]

Our current four color schemes are all pretty masculine and kind of similar. Let's add Seaweed and Ectoplasm into core. They're both bright, colorful, and pretty gender neutral.

[ryelle]

26468.diff​ contains ectoplasm & seaweed (and sets up for another color scheme variable, $action-color)

[ryelle]

removed the $action-color sass variable.

[ryelle]

26468.4.diff​ adds 4 schemes: Cyano, Ocean, Coffee, and Ectoplasm, and switches the scheme picker to 4 per row.

[helen]

No bright or warm colors? Has a sad.

[ryelle]

color schemes revised: now includes coffee, ocean, ectoplasm and sunrise.

[nacin]

In 26773:

Add four more color schemes to round out our collection at eight.

The new schemes are Ectoplasm, Coffee, Ocean, Sunrise. For those following along, the first three were at one point named Ghostbusters, Pixel, and Cape Cod.

See [26137] for the original color schemes.

props ryelle, melchoyce, drw158, littlethingsstudio.
fixes #26468. see #25858, #22862.

[nacin]

In 26776:

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.

[helen]

In 26804:

Remove duplicated lines in Ectoplasm's .scss file. see #26468.

[helen]

[26776] causes notices when light isn't a registered color scheme (e.g. running out of src) but you do have more than one. Probably does the same if default/fresh isn't registered.

Notice: Trying to get property of non-object in /srv/www/wp-core/develop/src/wp-admin/includes/misc.php on line 592

Notice: Trying to get property of non-object in /srv/www/wp-core/develop/src/wp-admin/includes/misc.php on line 597

Warning: Invalid argument supplied for foreach() in /srv/www/wp-core/develop/src/wp-admin/includes/misc.php on line 597

[nacin]

In 26814:

Avoid notices when default and light are not registered color schemes. see #26468.