Login screens links lack focus style

[afercia]

Log in, Register and Lost your password screens have links that lack the standard WordPress focus style.
Also, please notice the color contrast ratio is not sufficient for AA level but this belongs in a separate ticket and we're also waiting for #31234 to be in core.
See also related #31548.

[afercia]

Add standard focus style in login.css

[afercia]

This patch does only one, simple, small, thing: adds focus style for the login screens links (including the /?action=register and /?action=lostpassword screens). I'd recommend for commit consideration. See screenshot:

[obenland]

In FF and Safari I'm not even able to reach those links by tabbing, is that a known issue?

[joedolson]

Are you on a Mac? Do you have the Safari settings configured to allow tab to focus on links as well as inputs?

[obenland]

Ah, yes, that fixed in in Safari.

[joedolson]

It's a Mac issue relating to default settings, not something that WordPress has to deal with.

[afercia]

Also, for Firefox:
​https://bugzilla-dev.allizom.org/show_bug.cgi?id=1034338

...the fact that we honor that setting is a point of confusion for many web developrs and users, especially when they know about the separate setting in Safari

I think Firefox has just accessibility.tabfocus in about:config to expose that setting

[markjaquith]

Does what it says, should be a good change for accessibility!

[obenland]

In 32682:

Use WordPress' default focus styles for links on login screens.

Props afercia.
Fixes #31712.