Dashboard Welcome "Customize Your Site" w/ no background, header theme support

[Zeo]

If current theme has no widget, custom background and header support it should display a different info under "Customize Your Site"

The dashboard welcome is only supposed to show info about the bundled default theme, not update with themes as they get changed around.

I think it was coded this way because Twenty Eleven may not be the default theme in a multisite environment. Easy to adjust, but I think it should leverage the internal default theme, rather than "Twenty Eleven." (Currently, it relies on the current theme, which I agree is ehh.)

@nacin: I thought it had been decided not to even show the welcome on new sites in a multisite install?

Replying to jane:

@nacin: I thought it had been decided not to even show the welcome on new sites in a multisite install?

The decision was that the welcome would be shown to the owner of the site in a multisite install, if the owner has never seen the welcome screen before on any other site.

Sidenote on implementation, the more I look at the language, the more I realize it is reliant on the current theme being the default theme. I'm catching some rest and will work with ryan on this in the morning to nail down the desired behavior.

This code handles lots of edge cases. Broken current theme, no themes at all, WP_DEFAULT_THEME is not twentyeleven, a custom installer set the default theme to something other than twentyeleven, current theme does not have certain capabilities, current theme is not the default theme, and probably a few other things we haven't thought about. And with 19408.diff it handles the theme not having any known customization screens.

I'm fine with 19408.diff​ though it reads weird when there is only one customization screen.

Patch is good.

I think if there's only one theme installed, don't show the whole column or add another condition with "Use the current theme &mdash; %1$s &mdash; or <a href="%2$s">Install a new theme</a>.".

That of course is a very rare case.

Tested with Twenty Eleven, Twenty Ten, empty themes directory, broken current theme, and a mix of themes from the theme directory. The language when there is only one customization screen is indeed odd but good enough for now.

Fine with that.

in 19408.diff​, perhaps use:

• Choose light or dark color scheme
• Set a background image or color

In [19545]:

Handle themes that have no customization screens. fixes #19408

Leaving the changes suggested by zeo for a later time.

Removing i18n-change since we're freezing strings now.