Accessibility: Underline the links in the Plugins descriptions and update notices.

Links within blocks and lines of text should always be underlined.

Props Travel_girl, chetan200891, Shital Patel.
Fixes #42647.


git-svn-id: https://develop.svn.wordpress.org/trunk@42810 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/css/list-tables.css

@@ -1350,6 +1350,12 @@ ul.cat-checklist {
 	margin: 0.5em 0;
 }
 
+.plugins .plugin-description a,
+.plugins .plugin-update a,
+.updates-table .plugin-title a {
+	text-decoration: underline;
+}
+
 .plugin-card .update-now:before {
 	color: #f56e28;
 	content: "\f463";