- fixed the Tcl command Cncjob: there was a problem reported as issue #416. The command did not work due of the dpp parameter

- modified the Tcl command Cncjob such that if some of the parameters are not used then the default values will be used (set with set_sys)
- modified the Tcl command Drillcncjob to use the defaults when some of the parameters are not used

flatcamGUI/FlatCAMGUI.py

@@ -2869,7 +2869,7 @@ class FlatCAMGUI(QtWidgets.QMainWindow):
 
                 # Open Project
                 if key == QtCore.Qt.Key_O:
-                    self.app.on_file_openproject()
+                    self.app.on_file_openproject(signal=None)
 
                 # Open Project
                 if key == QtCore.Qt.Key_P: