Add context menu to DxGrouping components

src/components/Pages/Keluhan/Rekap/RKeluhan_PerJenisKeluhan.vue

@@ -25,6 +25,7 @@
       column-resizing-mode="widget"
       :word-wrap-enabled="true"
     >
+      <DxGrouping expand-mode="rowClick" />
       <DxSelection mode="single" />
       <DxPaging :enabled="false" />
       <DxScrolling column-rendering-mode="virtual" mode="virtual" />
@@ -900,7 +901,8 @@ import {
   DxScrolling,
   DxSearchPanel,
   DxSelection,
-  DxGroupItem
+  DxGroupItem,
+  DxGrouping
 } from 'devextreme-vue/data-grid'
 import { jsPDF } from 'jspdf'
 import { exportDataGrid as exportToPdf } from 'devextreme/pdf_exporter'