renamed material name to product name, removed headings

src/app/users/users.component.html

@@ -1,4 +1,3 @@
-<h2>Users</h2>
 
 <rb-icon-button icon="add" mode="primary" (click)="addNewUser()">New user</rb-icon-button>
 

src/app/users/users.component.ts

@@ -41,6 +41,7 @@ export class UsersComponent implements OnInit {
   }
 
   saveUser(user: UserModel) {
+    user.models = user.models.filter(e => e !== '');
     this.api.put<UserModel>('/user/' + user.origName, user.sendFormat('admin'), data => {
       user.deserialize(data);
       user.edit = false;