removed default group from 'entitled to vote' selection

client/src/app/core/repositories/users/group-repository.service.ts

@@ -1,6 +1,8 @@
 import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
 
 import { HttpService } from 'app/core/core-services/http.service';
 import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
@@ -194,4 +196,12 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group, Gro
             }
         });
     }
+
+    /**
+     * Returns an Observable for all groups except the default group.
+     */
+    public getViewModelListObservableWithoutDefaultGroup(): Observable<ViewGroup[]> {
+        // since groups are sorted by id, default is always the first entry
+        return this.getViewModelListObservable().pipe(map(groups => groups.slice(1)));
+    }
 }

client/src/app/site/config/components/config-field/config-field.component.ts

@@ -147,7 +147,9 @@ export class ConfigFieldComponent extends BaseComponent implements OnInit, OnDes
      */
     public ngOnInit(): void {
         // filter out empty results in group observable. We never have no groups and it messes up the settings change detection
-        this.groupObservable = this.groupRepo.getViewModelListObservable().pipe(filter(groups => !!groups.length));
+        this.groupObservable = this.groupRepo
+            .getViewModelListObservableWithoutDefaultGroup()
+            .pipe(filter(groups => !!groups.length));
 
         this.form = this.formBuilder.group({
             value: [''],

client/src/app/site/polls/components/poll-form/poll-form.component.ts

@@ -102,7 +102,8 @@ export class PollFormComponent<T extends ViewBasePoll> extends BaseViewComponent
      * Sets the observable for groups.
      */
     public ngOnInit(): void {
-        this.groupObservable = this.groupRepo.getViewModelListObservable();
+        // without default group since default cant ever vote
+        this.groupObservable = this.groupRepo.getViewModelListObservableWithoutDefaultGroup();
 
         if (this.data) {
             if (this.data instanceof ViewAssignmentPoll) {