message: Step 8.4.1: Use `RoomViewStore` in SGWidgetDriver over `ActiveRoomObserver`
  It wasn't using the listener functionality anyways, so just go straight to the source for which room is being viewed.
diff: @@ -37,7 +37,6 @@ import { THREAD_RELATION_TYPE } from "matrix-js-sdk/src/models/thread";
  import { iterableDiff, iterableIntersection } from "../../utils/iterables";
  import { MatrixClientPeg } from "../../MatrixClientPeg";
  -import ActiveRoomObserver from "../../ActiveRoomObserver";
  import Modal from "../../Modal";
  import WidgetOpenIDPermissionsDialog from "../../components/views/dialogs/WidgetOpenIDPermissionsDialog";
  import WidgetCapabilitiesPromptDialog from "../../components/views/dialogs/WidgetCapabilitiesPromptDialog";
  @@ -49,6 +48,7 @@ import { containsEmoji } from "../../effects/utils";
  import dis from "../../dispatcher/dispatcher";
  import { tryTransformPermalinkToLocalHref } from "../../utils/permalinks/Permalinks";
  import SettingsStore from "../../settings/SettingsStore";
  +import { RoomViewStore } from "../RoomViewStore";
  // TODO: Purge this from the universe
  @@ -150,7 +150,7 @@ export class StopGapWidgetDriver extends WidgetDriver {
  targetRoomId: string = null,
  ): Promise<ISendEventDetails> {
  const client = MatrixClientPeg.get();
  - const roomId = targetRoomId || ActiveRoomObserver.activeRoomId;
  + const roomId = targetRoomId || RoomViewStore.instance.getRoomId();
  if (!client || !roomId) throw new Error("Not in a room or not attached to a client");
  @@ -188,7 +188,7 @@ export class StopGapWidgetDriver extends WidgetDriver {
  const targetRooms = roomIds
  ? (roomIds.includes(Symbols.AnyRoom) ? client.getVisibleRooms() : roomIds.map(r => client.getRoom(r)))
  - : [client.getRoom(ActiveRoomObserver.activeRoomId)];
  + : [client.getRoom(RoomViewStore.instance.getRoomId())];
  return targetRooms.filter(r => !!r);
  }
  