minor scrollbar fixes

Hide page scrollbar when rendering using phantomjs.
Hide baron scrollbar when rendering using phantomjs.

public/sass/components/_scrollbar.scss

@@ -276,6 +276,11 @@
   opacity: 0.9;
 }
 
+// fix for phantomjs
+.body--phantomjs .baron__track .baron__bar {
+  opacity: 0 !important;
+}
+
 .baron__control {
   display: none;
 }

public/sass/layout/_page.scss

@@ -34,6 +34,13 @@
   }
 }
 
+// fix for phantomjs
+.body--phantomjs {
+  .scroll-canvas {
+    overflow: hidden;
+  }
+}
+
 .page-body {
   padding-top: $spacer*2;
   min-height: 500px;