fix bug for path's name when saving GPS file

closes #140 (closed)

sohstationviewer/view/plotting/gps_plot/gps_dialog.py

@@ -356,7 +356,7 @@ class GPSDialog(QtWidgets.QWidget):
         try:
             folder_name = self.data_path.name
         except AttributeError:
-            folder_name = self.data_path
+            folder_name = self.data_path.split(os.sep)[-1]
         export_file_path = self.export_path / f'{folder_name}.gps.dat'
 
         try: