message: [UI] Fix improperly parented walletView.
  Fixes
diff: @@ -42,7 +42,7 @@ bool WalletFrame::addWallet(const QString& name, WalletModel* walletModel)
  if (!gui || !clientModel || !walletModel || mapWalletViews.count(name) > 0)
  return false;
  - WalletView* walletView = new WalletView(this);
  + WalletView* walletView = new WalletView(walletStack);
  walletView->setBitcoinGUI(gui);
  walletView->setClientModel(clientModel);
  walletView->setWalletModel(walletModel);
  