Method setShowGrid

src/gui/SpectrumWidget.cpp:1634–1640

    s.save();
}
void SpectrumWidget::setShowGrid(bool on) {
    m_showGrid = on;
    auto& s = AppSettings::instance();
    s.setValue(settingsKey("DisplayShowGrid"), on ? "True" : "False");
    s.save();
    markOverlayDirty();
}
void SpectrumWidget::setFreqGridSpacing(int khz) {
    m_freqGridSpacingKhz = khz;
    auto& s = AppSettings::instance();