Information in the progress window (example: rescan) is displayed capped to fixed size instead of contents.

<img width="209" alt="screenshot 2018-12-21 at 14 58 20" src="https://user-images.githubusercontent.com/26601261/50345943-0bbd4300-0531-11e9-9c6c-e277ac69eb0c.png">

{
    AskPassphraseDialog dlg(AskPassphraseDialog::ChangePass, this);
    dlg.setModel(walletModel);
    dlg.exec();
}
void WalletView::unlockWallet()
{
    if(!walletModel)
        return;
    
    if (walletModel->getEncryptionStatus() == WalletModel::Locked)
    {
        AskPassphraseDialog dlg(AskPassphraseDialog::Unlock, this);
        dlg.setModel(walletModel);
        dlg.exec();
    }
}
void WalletView::usedSendingAddresses()
{
    if(!walletModel)
        return;
    GUIUtil::bringToFront(usedSendingAddressesPage);
}
void WalletView::usedReceivingAddresses()
{
    if(!walletModel)
        return;
    GUIUtil::bringToFront(usedReceivingAddressesPage);
}
void WalletView::showProgress(const QString &title, int nProgress)