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/report/beli/retur.js

@@ -14,13 +14,13 @@ var RepoBeliReturJS = {
     PHP: '',
     KODE: '',
 
-    index: function(){
+    index() {
         $('#butCetak').click(() => this.proses_print(true));
         $('#butPreview').click(() => this.proses_print());
         $('#butExcel').click(() => this.proses_dload());
     },
 
-    proses_print: function(prt){
+    proses_print(prt) {
         var cetak = new Printer(this.PHP + '/print');
         cetak.add_param("Tipe");
         cetak.add_param("CabID");
@@ -30,7 +30,7 @@ var RepoBeliReturJS = {
         if (prt) cetak.doPrint(); else cetak.doPreview();
     },
 
-    proses_dload: function(){
+    proses_dload() {
         var dload = new Download(this.PHP + '/excel');
         dload.add_param("Tipe");
         dload.add_param("CabID");