There's a few small issues left over from #15450:

* [Focusing](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-282297760) on the `Encrypt Wallet` dialog after clicking `Create Wallet`.
> ```cpp
> m_passphrase_dialog->setWindowModality(Qt::ApplicationModal); 
> m_passphrase_dialog->show();
> ```

* Wallet [name escaping issue](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-282297760):
> This is at least one inconsistency where if you create a wallet with a HTML escaped character in the name, i.e Alice & Bob, then the & will not be shown in some menus / dialogs.

* Nits from this [review](https://github.com/bitcoin/bitcoin/pull/15450#pullrequestreview-284450044). 
if (QApplication::activeModalWidget()) {
            connect(qApp, &QApplication::focusWindowChanged, wallet_model, [this, wallet_model]() {
                if (!QApplication::activeModalWidget()) {
                    removeAndDeleteWallet(wallet_model);
                }
            }, Qt::QueuedConnection);
        } else {
            removeAndDeleteWallet(wallet_model);
        }
    });
    
    connect(wallet_model, &WalletModel::coinsSent, this, &WalletController::coinsSent);
    
    Q_EMIT walletAdded(wallet_model);
    return wallet_model;
}
void WalletController::removeAndDeleteWallet(WalletModel* wallet_model)
{
    
    {
        QMutexLocker locker(&m_mutex);
        m_wallets.erase(std::remove(m_wallets.begin(), m_wallets.end(), wallet_model));
    }
    Q_EMIT walletRemoved(wallet_model);
    
    
    delete wallet_model;
}
WalletControllerActivity::WalletControllerActivity(WalletController* wallet_controller, QWidget* parent_widget)