WEBP_SETTING_QUALITY
fQualitySlider->SetValue(fSettings->SetGetInt32(WEBP_SETTING_QUALITY));
{ WEBP_SETTING_QUALITY, kMsgQuality, TRAN_SETTING_INT32 },
config.quality = (float)fSettings->SetGetInt32(WEBP_SETTING_QUALITY);
{ WEBP_SETTING_QUALITY, TRAN_SETTING_INT32, 60 },