Renamed groups to roles in the frontend

Working:
 Account
 Cost Centre
 Employee
 Product Group
 Product
 Role
 User
 Client

overlord/src/app/role/role-list/role-list.component.ts

@@ -0,0 +1,31 @@
+import {Component, OnInit, ViewChild} from '@angular/core';
+import { MatPaginator } from '@angular/material/paginator';
+import { MatSort } from '@angular/material/sort';
+import {RoleListDatasource} from './role-list-datasource';
+import {Role} from '../role';
+import {ActivatedRoute} from '@angular/router';
+
+@Component({
+  selector: 'app-role-list',
+  templateUrl: './role-list.component.html',
+  styleUrls: ['./role-list.component.css']
+})
+export class RoleListComponent implements OnInit {
+  @ViewChild(MatPaginator, { static: true }) paginator: MatPaginator;
+  @ViewChild(MatSort, { static: true }) sort: MatSort;
+  dataSource: RoleListDatasource;
+  list: Role[];
+  /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
+  displayedColumns = ['name', 'permissions'];
+
+  constructor(private route: ActivatedRoute) {
+  }
+
+  ngOnInit() {
+    this.route.data
+      .subscribe((data: { list: Role[] }) => {
+        this.list = data.list;
+      });
+    this.dataSource = new RoleListDatasource(this.paginator, this.sort, this.list);
+  }
+}