fix double scrollbar display bug in mobile

src/App.js

@@ -39,7 +39,14 @@ export default {
         window.CSS.supports('-moz-mask-size', 'contain') ||
         window.CSS.supports('-ms-mask-size', 'contain') ||
         window.CSS.supports('-o-mask-size', 'contain')
-    )
+    ),
+    isMobile: navigator.userAgent.match(/Android/i) ||
+      navigator.userAgent.match(/webOS/i) ||
+      navigator.userAgent.match(/iPhone/i) ||
+      navigator.userAgent.match(/iPad/i) ||
+      navigator.userAgent.match(/iPod/i) ||
+      navigator.userAgent.match(/BlackBerry/i) ||
+      navigator.userAgent.match(/Windows Phone/i)
   }),
   created () {
     // Load the locale from the storage

src/App.scss

@@ -839,3 +839,14 @@ nav {
 .vb.vb-dragging-phantom > .vb-dragger > .vb-dragger-styler {
   opacity: .5;
 }
+
+// Disable vuebar and use native scrollbar in mobile device
+#app.mobile {
+  .vb-content {
+    width: 100% !important;
+    padding-right: 0 !important;
+  }
+  .vb-dragger {
+    display: none;
+  }
+}

src/App.vue

@@ -1,5 +1,5 @@
 <template>
-  <div id="app" v-bind:style="bgAppStyle">
+  <div id="app" v-bind:style="bgAppStyle" v-bind:class="{ mobile: isMobile }">
     <div class="app-bg-wrapper" v-bind:style="bgStyle"></div>
     <MobileNav v-if="isMobileLayout" />
     <nav v-else class='nav-bar container' @click="scrollToTop()" id="nav">

src/components/user_reporting_modal/user_reporting_modal.vue

@@ -102,8 +102,8 @@
   }
 
   &-right {
-    overflow-y: auto;
-    overflow-x: hidden;
+    display: flex;
+    flex-direction: column;
   }
 
   &-sitem {