Update scrollbars after toggle sidebar

app/assets/javascripts/sidebar.js.coffee

@@ -8,4 +8,10 @@ $(document).on("click", '.toggle-nav-collapse', (e) ->
   $('.sidebar-wrapper').toggleClass("sidebar-collapsed sidebar-expanded")
   $('.toggle-nav-collapse i').toggleClass("fa-angle-right fa-angle-left")
   $.cookie("collapsed_nav", $('.page-with-sidebar').hasClass(collapsed), { path: '/' })
+
+  setTimeout ( ->
+    niceScrollBars = $('.nicescroll').niceScroll();
+    niceScrollBars.updateScrollBar();
+  ), 300
+
 )