Improvements to role form.

frontend/app/features/settings/pages/roles/role.component.ts

@@ -93,7 +93,7 @@ export class RoleComponent implements OnChanges {
         if (value) {
             this.rolesState.update(this.role, value)
                 .subscribe(() => {
-                    this.editForm.submitCompleted();
+                    this.editForm.submitCompleted({ noReset: true });
 
                     this.toggleEditing();
                 }, error => {

frontend/app/framework/angular/forms/editors/autocomplete.component.ts

@@ -66,7 +66,7 @@ export class AutocompleteComponent extends StatefulControlComponent<State, Reado
     public displayProperty: string;
 
     @Input()
-    public placeholder: string;
+    public placeholder = '';
 
     @Input()
     public icon: string;