fix(scrollbar): remove custom scrollbar

client/components/sidebar/sidebar.jade

@@ -9,7 +9,7 @@ template(name="sidebar")
         a.board-header-btn.js-shortcuts
           i.fa.fa-keyboard-o
           span {{_ 'keyboard-shortcuts' }}
-      .sidebar-content.js-board-sidebar-content.js-perfect-scrollbar
+      .sidebar-content.js-board-sidebar-content
         //a.hide-btn.js-hide-sidebar
         //  i.fa.fa-navicon
         unless isDefaultView

client/components/sidebar/sidebar.js

@@ -16,7 +16,7 @@ const viewTitles = {
 
 BlazeComponent.extendComponent({
   mixins() {
-    return [Mixins.InfiniteScrolling, Mixins.PerfectScrollbar];
+    return [Mixins.InfiniteScrolling];
   },
 
   onCreated() {

client/components/sidebar/sidebarSearches.jade

@@ -1,7 +1,7 @@
 template(name="searchSidebar")
   form.js-search-term-form
     input(type="text" name="searchTerm" placeholder="{{_ 'search-example'}}" autofocus dir="auto")
-  .list-body.js-perfect-scrollbar
+  .list-body
     .minilists.clearfix.js-minilists
       each (lists)
         a.minilist-wrapper.js-minilist(href=absoluteUrl)