Revert "disable flexible collections"

This reverts commit cf55ecd.

Author: stefan0xC

apps/web/src/app/admin-console/organizations/settings/account.component.ts

@@ -195,7 +195,6 @@ export class AccountComponent implements OnInit, OnDestroy {
   };
 
   submitCollectionManagement = async () => {
-    return; // flexible collections are not supported by Vaultwarden
     const request = new OrganizationCollectionManagementUpdateRequest();
     request.limitCollectionCreation =
       this.collectionManagementFormGroup.value.limitCollectionCreation;