Make threads use new UTD UI (#9876)

* Make threads use new UTD UI

src/components/views/rooms/EventTile.tsx

@@ -36,6 +36,7 @@ import { Layout } from "../../../settings/enums/Layout";
 import { formatTime } from "../../../DateUtils";
 import { MatrixClientPeg } from "../../../MatrixClientPeg";
 import MatrixClientContext from "../../../contexts/MatrixClientContext";
+import DecryptionFailureBody from "../messages/DecryptionFailureBody";
 import { E2EState } from "./E2EIcon";
 import RoomAvatar from "../avatars/RoomAvatar";
 import MessageContextMenu from "../context_menus/MessageContextMenu";
@@ -1329,6 +1330,8 @@ export class UnwrappedEventTile extends React.Component<EventTileProps, IState>
                             <div className="mx_EventTile_body">
                                 {this.props.mxEvent.isRedacted() ? (
                                     <RedactedBody mxEvent={this.props.mxEvent} />
+                                ) : this.props.mxEvent.isDecryptionFailure() ? (
+                                    <DecryptionFailureBody />
                                 ) : (
                                     MessagePreviewStore.instance.generatePreviewForEvent(this.props.mxEvent)
                                 )}