message: Listen for our own membership changes on notification states
  Fixes (part 1)
  When we transition from invite to not-invite we need to ensure we clear the invite notification state.
diff: @@ -31,6 +31,7 @@ export class RoomNotificationState extends NotificationState implements IDestroy
  this.room.on("Room.receipt", this.handleReadReceipt);
  this.room.on("Room.timeline", this.handleRoomEventUpdate);
  this.room.on("Room.redaction", this.handleRoomEventUpdate);
  + this.room.on("Room.myMembership", this.handleMembershipUpdate);
  MatrixClientPeg.get().on("Event.decrypted", this.handleRoomEventUpdate);
  MatrixClientPeg.get().on("accountData", this.handleAccountDataUpdate);
  this.updateNotificationState();
  @@ -45,6 +46,7 @@ export class RoomNotificationState extends NotificationState implements IDestroy
  this.room.removeListener("Room.receipt", this.handleReadReceipt);
  this.room.removeListener("Room.timeline", this.handleRoomEventUpdate);
  this.room.removeListener("Room.redaction", this.handleRoomEventUpdate);
  + this.room.removeListener("Room.myMembership", this.handleMembershipUpdate);
  if (MatrixClientPeg.get()) {
  MatrixClientPeg.get().removeListener("Event.decrypted", this.handleRoomEventUpdate);
  MatrixClientPeg.get().removeListener("accountData", this.handleAccountDataUpdate);
  @@ -57,6 +59,10 @@ export class RoomNotificationState extends NotificationState implements IDestroy
  this.updateNotificationState();
  };
  + private handleMembershipUpdate = () => {
  + this.updateNotificationState();
  + };
  +
  private handleRoomEventUpdate = (event: MatrixEvent) => {
  const roomId = event.getRoomId();
  