The extra border was visible in the responsive view for smaller screens after [32844]. Props jitendrabanjara1991. Merges [45501] and [45502] to the 5.2 branch. Fixes #46749 for 5.2.2. Built from https://develop.svn.wordpress.org/branches/5.2@45513 git-svn-id: http://core.svn.wordpress.org/branches/5.2@45324 1a063a9b-81f0-0310-95a4-ce76da25c4cd
line-height
wp-admin/css/admin-menu.css
wp-admin/css/color-picker.css
wp-admin/css/customize-controls.css