Added prio to task creation

src/app/task-form/task-form.component.ts

@@ -39,7 +39,7 @@ export class TaskFormComponent implements OnInit {
               });
         }
         else {
-            this.task = { title: this.title, content: this.content };
+            this.task = { title: this.title, content: this.content, priority: this.prio };
             this.backendService.postTask(this.task).subscribe(response => {
                 if (response.status > 399) {
                   alert('Fehler');