Index: src/js/_enqueues/admin/common.js
===================================================================
--- src/js/_enqueues/admin/common.js	(revision 44621)
+++ src/js/_enqueues/admin/common.js	(working copy)
@@ -110,7 +110,7 @@
 	 * @returns {string} The hidden column names separated by a comma.
 	 */
 	hidden : function() {
-		return $( '.manage-column[id]' ).filter( ':hidden' ).map(function() {
+		return $( '.manage-column[id]' ).filter( '.hidden' ).map(function() {
 			return this.id;
 		}).get().join( ',' );
 	},
Index: src/wp-admin/css/list-tables.css
===================================================================
--- src/wp-admin/css/list-tables.css	(revision 44621)
+++ src/wp-admin/css/list-tables.css	(working copy)
@@ -2034,6 +2034,11 @@
 		padding: 10px 9px; /* reset from other list tables that have a label at this width */
 	}
 
+	/* Plugin description hidden via Screen Options */
+	#wpbody-content .wp-list-table.plugins .desc.hidden {
+		display: none;
+	}
+
 	#wpbody-content .wp-list-table.plugins .column-description {
 		padding-top: 2px;
 	}