AMBARI-20660. HiveView2.0 scrolling in query tab does not work properly for a longer query (pallavkul)

contrib/views/hive20/src/main/resources/ui/app/styles/app.scss

@@ -973,3 +973,7 @@ rect.operator__box {
   bottom:10px;
   right:-15px;
 }
+
+.CodeMirror-scroll {
+  padding-bottom: 20px;
+}