Revert "Make TOC non-sticky, remove sticky-kit"

This reverts commit c0bcab5.

Author: bigbes

sphinx/_static/headers.js

@@ -180,6 +180,9 @@ $(document).ready(function () {
           }
           menu.children("ul").slideToggle();
           $(this).toggleClass("fa-plus-square-o").toggleClass("fa-minus-square-o");
+          $(".b-cols_content_left").trigger("sticky_kit:stick")
+          $(".b-cols_content_left").trigger("sticky_kit:recalc")
+          $(".b-cols_content_left").trigger("sticky_kit:unstick")
         }).css("position", "relative").css("left", "-17px");
         ul.children("li").each(toggle_recursive);
         menu.children("ul").css('display', 'none');
@@ -212,6 +215,14 @@ $(document).ready(function () {
         $(".toggle-navigation").removeClass('active');
       });
 
+      $(this).stick_in_parent({
+        parent: ".b-cols_content",
+        spacer: false
+      });
+
+      $(this).trigger("sticky_kit:stick");
+      $(this).trigger("sticky_kit:recalc");
+      $(this).trigger("sticky_kit:unstick");
     }).click(function() {
       if (is_mobile) {
         event.stopPropagation();

sphinx/_static/jquery.sticky-kit.min.js

@@ -8,7 +8,8 @@
 {% set page = {"slug": "documentation"} %}
 {% set script_files = script_files + [
         '_static/stacktable.min.js',
-        '_static/headers.js'
+        '_static/headers.js',
+        '_static/jquery.sticky-kit.min.js'
 ] %}
 {% set css_files = [
       '_static/sphinx_design.css',