Links in the admin footer should be underlined

[afercia]

For accessibility, not all links must be underlined. When links are perceivable as links thanks to the context, for example in a navigation menu or in a set of UI controls, they often don't need to be underlined:

However, when links are within a line/block of text or they aren't clearly perceivable as an actionable control, they should always be underlined. They can't rely on color alone because they could be hard to distinguish from the surrounding text for users with color blindness or other visual impairments.

In the footer, the "Get Version" link could be an exception but all the other links should be underlined. To keep it simple I'd propose to underline them all.

[Presskopp]

I'm not sure if the solution could really be so easy, or if I totally misinterpreted the task :)

[afercia]

@Presskopp yep, I think it's just that :) thanks for the patch!

[Presskopp]

related #37527

[SergeyBiryukov]

In 38347:

Administration: Underline links in the admin footer for better accessibility.

Props Presskopp.
Fixes #37529.