Add :focus style to all links, use JS to blur() them on click so the style is only visible when tabbing, props lessbloat, see #21324

git-svn-id: https://develop.svn.wordpress.org/trunk@21529 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/js/common.dev.js

@@ -375,6 +375,11 @@ $(document).ready( function() {
 				pageInput.val('1');
 		});
 	}
+
+	// Blur accessibility link background color onclick
+	$(document).on('click.wp-accessibility-blur', 'a', function() {
+		$(this).blur();
+	});
 });
 
 // internal use