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">

showHelpMessageAction->setMenuRole(QAction::NoRole);
    showHelpMessageAction->setStatusTip(tr("Show the %1 help message to get a list with possible Bitcoin command-line options").arg(tr(PACKAGE_NAME)));
    connect(quitAction, &QAction::triggered, qApp, QApplication::quit);
    connect(aboutAction, &QAction::triggered, this, &BitcoinGUI::aboutClicked);
    connect(aboutQtAction, &QAction::triggered, qApp, QApplication::aboutQt);
    connect(optionsAction, &QAction::triggered, this, &BitcoinGUI::optionsClicked);
    connect(toggleHideAction, &QAction::triggered, this, &BitcoinGUI::toggleHidden);
    connect(showHelpMessageAction, &QAction::triggered, this, &BitcoinGUI::showHelpMessageClicked);
    connect(openRPCConsoleAction, &QAction::triggered, this, &BitcoinGUI::showDebugWindow);
    
    connect(quitAction, &QAction::triggered, rpcConsole, &QWidget::hide);
#ifdef ENABLE_WALLET
    if(walletFrame)
    {
        connect(encryptWalletAction, &QAction::triggered, walletFrame, &WalletFrame::encryptWallet);
        connect(backupWalletAction, &QAction::triggered, walletFrame, &WalletFrame::backupWallet);
        connect(changePassphraseAction, &QAction::triggered, walletFrame, &WalletFrame::changePassphrase);
        connect(signMessageAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
        connect(signMessageAction, &QAction::triggered, [this]{ gotoSignMessageTab(); });
        connect(verifyMessageAction, &QAction::triggered, [this]{ showNormalIfMinimized(); });
        connect(verifyMessageAction, &QAction::triggered, [this]{ gotoVerifyMessageTab(); });
        connect(usedSendingAddressesAction, &QAction::triggered, walletFrame, &WalletFrame::usedSendingAddresses);
        connect(usedReceivingAddressesAction, &QAction::triggered, walletFrame, &WalletFrame::usedReceivingAddresses);
        connect(openAction, &QAction::triggered, this, &BitcoinGUI::openClicked);
    }
#endif 
    connect(new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_C), this), &QShortcut::activated, this, &BitcoinGUI::showDebugWindowActivateConsole);
    connect(new QShortcut(QKeySequence(Qt::CTRL + Qt::SHIFT + Qt::Key_D), this), &QShortcut::activated, this, &BitcoinGUI::showDebugWindow);
}
void BitcoinGUI::createMenuBar()