Themes: update allowed theme tags with new WP features

[lancewillett]

Update the "wporg_theme_feature_list" to include tags for newer WP features so themes can denote they support the feature.

• featured-image-header
• featured-images
• full-width-template
• post-formats

Most of those features were added in Twenty Ten default theme and will exist in Twenty Eleven default theme as well.

Patch also adds missing "gray" tag to the color list.

[Otto42]

same tags added to org, will add to theme check shortly.

[lancewillett]

Would be cool to get this is in 3.2 because of the default theme (we missed it for Twenty Ten).

[nacin]

What is "Full-Width Template"?

I'm thinking "featured-images" and "post-formats" are the two major ones we should support. Stuff like featured-image-header sounds pretty niche, despite both of our default themes supporting it. (Something we should probably stop with now.)

[nacin]

Suggesting we break the freeze on this one.

[nacin]

Suggesting commit as otherwise we'll have English words show up via the API. The alternative to committing this would be to removing the tags until 3.3.

[lancewillett]

Replying to nacin:

What is "Full-Width Template"?

The theme has a page template that is full-width, no sidebar. It's a popular search query when end users are searching for themes.

I'm thinking "featured-images" and "post-formats" are the two major ones we should support. Stuff like featured-image-header sounds pretty niche, despite both of our default themes supporting it. (Something we should probably stop with now.)

I'm fine with dropping "featured-image-header" if the other three get in. Adding the missing color tag would be nice, too.

[nacin]

Suggest commit on the whole diff. I'll plead to the translators.

[azaozz]

To all of them? Commit +1.

[nacin]

Should Full-Width have a hyphen?

[lancewillett]

Replying to nacin:

Should Full-Width have a hyphen?

If I were writing it in prose the correct formatting would be "Full-width Template" — but I'd vote here for readability instead, using three full words in title case. Purposefully eschewing orthographic and grammatical standards for ease of scanning in the filter list.

[nacin]

In [18327]:

Add theme feature strings for translation. These are already being returned by the API. props lancewillett, fixes #17359.