Refactor member and product scripts to use concise method definitions

- Updated all function declarations to use ES6 shorthand method syntax in member.js, member_grup.js, point_barang.js, point_skema.js, point_tipe.js, kategori.js, operator.js, produk.js, produk_grup.js, rekpos.js, satuan.js, supplier.js, and varian.js.

app/Scripts/index.js

@@ -50,7 +50,7 @@ socket.on('super-data', (adata) => {
 
 var IndexJS = {
 
-    index: function(){
+    index() {
         new Request({
             url: 'index/index',
             sendParam: [],
@@ -66,7 +66,7 @@ var IndexJS = {
         }).send();
     },
 
-    get_picture: function(){
+    get_picture() {
         new Request({
             url: 'system/profile/get_picture',
             onSuccess: (ajson) => {
@@ -75,13 +75,13 @@ var IndexJS = {
         }).send();
     },
 
-    load_chart: function(){
+    load_chart() {
         this.data_query('chart-sale');
         this.data_query('chart-omzet');
         this.data_query('tabel-stok');
     },
 
-    data_query: function(tipe){
+    data_query(tipe) {
         if (tipe=="chart-sale"){
             new Request({
                 url: 'index/chart_sale',