Index: src/wp-admin/css/themes.css
===================================================================
--- src/wp-admin/css/themes.css	(revision 41026)
+++ src/wp-admin/css/themes.css	(working copy)
@@ -482,6 +482,7 @@
 	-webkit-box-shadow: 0 1px 20px 5px rgba(0, 0, 0, 0.1);
 	box-shadow: 0 1px 20px 5px rgba(0, 0, 0, 0.1);
 	z-index: 10000; /* Over WP Pointers. */
+
 	-webkit-box-sizing: border-box;
 	-moz-box-sizing: border-box;
 	box-sizing: border-box;
Index: src/wp-admin/includes/class-wp-comments-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-comments-list-table.php	(revision 41026)
+++ src/wp-admin/includes/class-wp-comments-list-table.php	(working copy)
@@ -327,7 +327,7 @@
 ?>
 		<div class="alignleft actions">
 <?php
-		if ( 'top' === $which ) {
+		if ( 'top' === $which && $this->has_comments() ) {
 ?>
 			<label class="screen-reader-text" for="filter-by-comment-type"><?php _e( 'Filter by comment type' ); ?></label>
 			<select id="filter-by-comment-type" name="comment_type">