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

main.cpp

@@ -149,7 +149,7 @@ int main(int argc, char *argv[])
                                            ).toBool () ? 1u : 4u;
       }
 
-      MainWindow w(multiple, &settings, &mem_jt9, my_key, downSampleFactor);
+      MainWindow w(multiple, &settings, &mem_jt9, my_key, downSampleFactor, parser.isSet (test_option));
       w.show();
 
       QObject::connect (&a, SIGNAL (lastWindowClosed()), &a, SLOT (quit()));