Site Health: Add missing actions to tests.

This change adds missing actions for several tests. This ensures that the user is provided with a next step, whenever possible.

Also, change the URL displayed in the WordPress.org communication test description to `api.wordpress.org` for accuracy.

Props: garrett-eclipse, Clorith, vaishalipanchal.
Fixes #46734.
Built from https://develop.svn.wordpress.org/trunk@45170


git-svn-id: http://core.svn.wordpress.org/trunk@44979 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/site-health-rtl.css

@@ -363,6 +363,10 @@
 	display: none;
 }
 
+.health-check-accordion-panel a .dashicons {
+	text-decoration: none;
+}
+
 /* Better position for the WordPress admin notices and update nag. */
 .site-health .notice {
 	margin: 5px 22px 15px 20px;

wp-admin/css/site-health.css

@@ -363,6 +363,10 @@
 	display: none;
 }
 
+.health-check-accordion-panel a .dashicons {
+	text-decoration: none;
+}
+
 /* Better position for the WordPress admin notices and update nag. */
 .site-health .notice {
 	margin: 5px 20px 15px 22px;