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.

src/stores/widgets/StopGapWidgetDriver.ts

@@ -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);
     }