This PR removes a call to m_settings.save() in the destructor of MainWindow because the same call is made when handling the close event which happens just before the call to the destructor when terminating Sdrangel normally, as noted in #2107. When killing Sdrangel with Ctrl+C or similar, neither closeEvent nor ~MainWindow are called so the settings aren't saved anyway.
This PR removes a call to m_settings.save() in the destructor of MainWindow because the same call is made when handling the close event which happens just before the call to the destructor when terminating Sdrangel normally, as noted in #2107. When killing Sdrangel with Ctrl+C or similar, neither
closeEventnor~MainWindoware called so the settings aren't saved anyway.