Administration: Save column visibility on small screens.

Modifies the jQuery selector for determining hidden columns to ensure they are detected when the expanded columns details are closed.

Adds high-specificity selectors specifically for setting screen options in the comments and plugins lists.

Props afercia.
Fixes #46005. 



git-svn-id: https://develop.svn.wordpress.org/trunk@44722 602fd350-edb4-49c9-b593-d223f7449a82

src/js/_enqueues/admin/common.js

@@ -110,7 +110,7 @@ window.columns = {
 	 * @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( ',' );
 	},

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

@@ -1789,6 +1789,11 @@ div.action-links,
 		display: block;
 	}
 
+	/* Comment author hidden via Screen Options */
+	.fixed .column-author.hidden ~ .column-comment .comment-author {
+		display: none;
+	}
+
 	#the-comment-list .is-expanded td {
 		box-shadow: none;
 	}
@@ -2009,6 +2014,11 @@ div.action-links,
 		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;
 	}