Qt5: Settings Path is not set correctly on Linux

When using qt.conf and the Settings Entry is not specified in qt.conf, create a QSettings using QSettings::SystemScope, and the settings are saved into the .conf file under the root directory "/". The .conf file should be created in the directory where the executable file is.

With the example code below, the settings are saved in "/MyDir/Settings.conf" instead of "./MyDir/Settings.conf"

QSettings settings(QSettings::SystemScope, "MyDir", "Settings");
settings.setValue("editor/wrapMargin", 80);

Please investigate.