bugfix when closing the app fro, macos finder

MDANSE/GUI/JobControllerPanel.py

@@ -75,6 +75,8 @@ class JobController(threading.Thread):
         '''
         
         threading.Thread.__init__(self)
+
+        self.setDaemon(True)
         
         # The wx object related to this thread
         self._window = window
@@ -366,4 +368,4 @@ if __name__ == "__main__":
     
     
     
-    
\ No newline at end of file
+