Improvement following [59914] to make the position of the skip to content link consistent across different states and viewports. Props sabernhardt, himanshupathak95, joedolson. Fixes #62969. Built from https://develop.svn.wordpress.org/trunk@59991 git-svn-id: http://core.svn.wordpress.org/trunk@59333 1a063a9b-81f0-0310-95a4-ce76da25c4cd