Don't use required validator in edit verb form

Author: Leoniiii

source/src/app/menu/components/edit-verb/edit-verb.component.ts

@@ -46,7 +46,7 @@ export class EditVerbComponent implements OnInit {
       // id is a hidden field just to manage "update" cases
       id: this.fb.control(null),
       text: this.fb.control(null, [Validators.required]),
-      audio: new FormControl(null, [Validators.required]),
+      audio: new FormControl(null),
     });
 
     if (this.verb) {