Allow vertical scrollbars to be disabled (user preferences, visible by default)

client/components/lists/listBody.jade

@@ -1,6 +1,6 @@
 template(name="listBody")
   unless collapsed
-    .list-body
+    .list-body(class="{{#unless isVerticalScrollbars}}no-scrollbars{{/unless}}")
       .minicards.clearfix.js-minicards(class="{{#if reachedWipLimit}}js-list-full{{/if}}")
         if cards.length
           +inlinedForm(autoclose=false position="top")

client/components/lists/listBody.js

@@ -231,6 +231,11 @@ BlazeComponent.extendComponent({
     );
   },
 
+  isVerticalScrollbars() {
+    const user = ReactiveCache.getCurrentUser();
+    return user && user.isVerticalScrollbars();
+  },
+
   cardDetailsPopup(event) {
     if (!Popup.isOpen()) {
       Popup.open("cardDetails")(event);