In [59138], the login screens were updated to change the `h1` heading from the logo to screen-reader hidden text. Along with that HTML change, we changed the CSS selectors from `.login h1` to `.login .wp-login-logo`. This unnecessary change increased specificity and broke the CSS selectors used by a wide variety of plugins to replace the login logo.
Commit reverts the change in selector back to using the `.login h1` pattern.
Props leecollings, sabernhardt, im3dabasia1, roytanck, sailpete, joedolson.
Fixes#62410.
Built from https://develop.svn.wordpress.org/trunk@59424
git-svn-id: http://core.svn.wordpress.org/trunk@58810 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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