When you open wallets with exotic names, i.e `🦹🏿‍♂️` (Emoji Version 11), via the "Open Wallet" menu, the opening wallet dialog never closes, even after the wallet has finished loading.

![screen shot 2019-02-21 at 2 34 06 pm](https://user-images.githubusercontent.com/863730/53148554-012d3180-35e6-11e9-8a94-62c5fb023d40.png)

{
    m_activity_thread.quit();
    m_activity_thread.wait();
}
std::vector<WalletModel*> WalletController::getWallets() const
{
    QMutexLocker locker(&m_mutex);
    return m_wallets;
}
std::vector<std::string> WalletController::getWalletsAvailableToOpen() const
{
    QMutexLocker locker(&m_mutex);
    std::vector<std::string> wallets = m_node.listWalletDir();
    for (WalletModel* wallet_model : m_wallets) {
        auto it = std::remove(wallets.begin(), wallets.end(), wallet_model->wallet().getWalletName());
        if (it != wallets.end()) wallets.erase(it);
    }
    return wallets;
}
OpenWalletActivity* WalletController::openWallet(const std::string& name, QWidget* parent)