Sticky-header (s) tracker is broken after AJAX form update

Sticky headers stops tracking and changing visibility once a part of the page is updated with AJAX and Drupal.attachBehaviours is called.
This happend cause once Drupal.attachBehaviours is called then all previous data in "headers" variable (@see Drupal.behaviors.tableHeader) is erased. The data in "headers" variable presents array of already created sticky-header elements.

A proposed solution is very simple - prepopulate "headers" variable with already created sticky-header elements:

--- a/drupal/misc/tableheader.js
+++ b/drupal/misc/tableheader.js
@@ -15,6 +15,8 @@ Drupal.behaviors.tableHeader = function (context) {
   // Keep track of all cloned table headers.
   var headers = [];

+  $(".sticky-header").each(function(i, el){headers.push(el);});
+
   $('table.sticky-enabled thead:not(.tableHeader-processed)', context).each(function () {
     // Clone thead so it inherits original jQuery properties.
     var headerClone = $(this).clone(true).insertBefore(this.parentNode).wrap('<table class="sticky-header"></table>').parent().css({