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">

{
    fs::path pathDebug = GetDataDir() / "debug.log";
    
    if (fs::exists(pathDebug))
        QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathDebug)));
}
bool openBitcoinConf()
{
    fs::path pathConfig = GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME));
    
    fsbridge::ofstream configFile(pathConfig, std::ios_base::app);
    if (!configFile.good())
        return false;
    configFile.close();
    
    return QDesktopServices::openUrl(QUrl::fromLocalFile(boostPathToQString(pathConfig)));
}
ToolTipToRichTextFilter::ToolTipToRichTextFilter(int _size_threshold, QObject *parent) :