Global Styles: Update the order of pseudo selectors

[Mamaduka]

Backports changes from WordPress/gutenberg#45559

The order of the selectors should be: visited, hover, focus, active. This is to ensure that 'visited' has the lowest specificity and the other selectors can always overwrite it.

Props: @mikachan, @sabernhardt, @getdave (get_dave).

Trac ticket: https://core.trac.wordpress.org/ticket/56928

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This Pull Request is for code review only. Please keep all other discussion in the Trac ticket. Do not merge this Pull Request. See GitHub Pull Requests for Code Review in the Core Handbook for more details.

[desrosj]

Thanks @Mamaduka! I changed the ticket description to point to Trac-56928 since that ticket is specific to this issue/change.

[desrosj]

This looks good, but let's include the Trac ticket link for additional context as to why the selectors are ordered as such. I can add this comment when committing, but wanted to make sure you agreed.

Also, I'm indifferent as to whether this needs to be synced to the Gutenberg plugin as that class should disappear in a few releases. But it may be good for consistency.

[Mamaduka]

Thank you, @desrosj. The Trac ticket link makes sense to me, I will port changes back to the plugin for consistency 👍

[peterwilsoncc]

LGTM, matches the long term LoVe(F)HA rule.

[peterwilsoncc]

Merged in https://core.trac.wordpress.org/changeset/54774

[Mamaduka]

Thank you, @peterwilsoncc.

Now the only thing left is to cherry-pick the commit for the 6.1 branch.