Moved to Angular 6.0

----

Pending
* Table width for the points column in incentive
* Linting
* keyboard navigation where it was used earlier
* can remove the unused totals calculated serverside in productledger
* spinner and loading bars
* Activate Guard for Employee Function tabs
* Progress for Fingerprint uploads
* deleted reconcile and receipe features as they were not being used
* focus the right control on component load

overlord/src/app/purchase/purchase-resolver.service.ts

@@ -0,0 +1,23 @@
+import {Injectable} from '@angular/core';
+import {ActivatedRouteSnapshot, Resolve, RouterStateSnapshot} from '@angular/router';
+import {Observable} from 'rxjs/internal/Observable';
+import {Voucher} from '../journal/voucher';
+import {VoucherService} from '../journal/voucher.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class PurchaseResolver implements Resolve<Voucher> {
+
+  constructor(private ser: VoucherService) {
+  }
+
+  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<Voucher> {
+    const id = route.paramMap.get('id');
+    if (id === null) {
+      return this.ser.getOfType('Purchase');
+    } else {
+      return this.ser.get(id);
+    }
+  }
+}