void DeclarativeTabModel::setBrowsing(bool browsing)
{
    if (browsing != m_browsing) {
        m_browsing = browsing;
        if (m_browsing) {
            emit updateActiveThumbnail();
        }
        emit browsingChanged();
    }
}
void DeclarativeTabModel::setBrowsing(bool browsing)
{
    if (browsing != m_browsing) {
        if (browsing && m_currentTab && m_activeTab.isValid()) {
            m_currentTab->updateThumbPath(m_activeTab.currentLink().url(), "", m_activeTab.tabId());
            QFile f(m_activeTab.currentLink().thumbPath());
            if (f.exists()) {
                f.remove();
            }
            f.close();
        }

        m_browsing = browsing;
        emit browsingChanged();
    }
}