Issue #2014309 by nod_: Sticky table headers default to FALSE.

core/includes/theme.inc

@@ -3106,7 +3106,7 @@ function drupal_common_theme() {
       'template' => 'breadcrumb',
     ),
     'table' => array(
-      'variables' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL, 'colgroups' => array(), 'sticky' => TRUE, 'responsive' => TRUE, 'empty' => ''),
+      'variables' => array('header' => NULL, 'rows' => NULL, 'attributes' => array(), 'caption' => NULL, 'colgroups' => array(), 'sticky' => FALSE, 'responsive' => TRUE, 'empty' => ''),
     ),
     'tablesort_indicator' => array(
       'variables' => array('style' => NULL),

core/modules/system/lib/Drupal/system/Tests/Theme/TableTest.php

@@ -27,7 +27,7 @@ public static function getInfo() {
   function testThemeTableStickyHeaders() {
     $header = array('one', 'two', 'three');
     $rows = array(array(1,2,3), array(4,5,6), array(7,8,9));
-    $this->content = theme('table', array('header' => $header, 'rows' => $rows));
+    $this->content = theme('table', array('header' => $header, 'rows' => $rows, 'sticky' => TRUE));
     $js = drupal_add_js();
     $this->assertTrue(isset($js['core/misc/tableheader.js']), 'tableheader.js was included when $sticky = TRUE.');
     $this->assertRaw('sticky-enabled',  'Table has a class of sticky-enabled when $sticky = TRUE.');

core/modules/user/user.admin.inc

@@ -246,6 +246,7 @@ function theme_user_admin_permissions($variables) {
     '#attributes' => array(
       'id' => 'permissions',
     ),
+    '#sticky' => TRUE,
   );
   $output = drupal_render($system_compact_link);
   $output .= drupal_render($table);