message: Dismiss SSSS migration toast once migration done
diff: @@ -50,6 +50,7 @@ export default class DeviceListener {
  MatrixClientPeg.get().on('crypto.devicesUpdated', this._onDevicesUpdated);
  MatrixClientPeg.get().on('deviceVerificationChanged', this._onDeviceVerificationChanged);
  MatrixClientPeg.get().on('userTrustStatusChanged', this._onUserTrustStatusChanged);
  + MatrixClientPeg.get().on('accountData', this._onAccountData);
  this._recheck();
  }
  @@ -58,6 +59,7 @@ export default class DeviceListener {
  MatrixClientPeg.get().removeListener('crypto.devicesUpdated', this._onDevicesUpdated);
  MatrixClientPeg.get().removeListener('deviceVerificationChanged', this._onDeviceVerificationChanged);
  MatrixClientPeg.get().removeListener('userTrustStatusChanged', this._onUserTrustStatusChanged);
  + MatrixClientPeg.get().removeListener('accountData', this._onAccountData);
  }
  this._dismissed.clear();
  }
  @@ -87,6 +89,13 @@ export default class DeviceListener {
  this._recheck();
  }
  + _onAccountData = (ev) => {
  + // User may have migrated SSSS to symmetric, in which case we can dismiss that toast
  + if (ev.getType().startsWith('m.secret_storage.key.')) {
  + this._recheck();
  + }
  + }
  +
  // The server doesn't tell us when key backup is set up, so we poll
  // & cache the result
  async _getKeyBackupInfo() {
  