Make temp directory unique in test mode.

The Qt  test mode  that uses  special paths  for writeable  files (via
QtStandardPaths)  doesn't make  a special  temporary file  path.  This
change appends " - test_mode" to the WSJT-X unique temporary file path
so that an application run in test mode will not interact with another
running in normal mode.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4240 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

mainwindow.cpp

@@ -67,13 +67,13 @@ private:
 
 //--------------------------------------------------- MainWindow constructor
 MainWindow::MainWindow(bool multiple, QSettings * settings, QSharedMemory *shdmem, QString const& thekey,
-                       unsigned downSampleFactor, QWidget *parent) :
+                       unsigned downSampleFactor, bool test_mode, QWidget *parent) :
   QMainWindow(parent),
   m_revision {revision ("$Rev$")},
   m_multiple {multiple},
   m_settings (settings),
   ui(new Ui::MainWindow),
-  m_config (thekey, settings, this),
+  m_config (thekey, settings, test_mode, this),
   m_wideGraph (new WideGraph (settings)),
   m_logDlg (new LogQSO (program_title (), settings, &m_config, this)),
   m_dialFreq {0},