- fixed bug in NCC Tool: after trying to add a tool already in the Tool Table when trying to change the Tool Type the GUI does not change

- final fix for app not quiting when running a script as argument, script that has the quit_flatcam Tcl command; fixed issue #360
- fixed issue #363. The Tcl command drillcncjob does not create tool cut, does not allow creation of gcode, it forces the usage of dwell and dwelltime parameters

flatcamTools/ToolProperties.py

@@ -468,7 +468,7 @@ class Properties(FlatCAMTool):
                         _("Depth of Cut"),
                         '%.*f %s' % (
                             self.decimals,
-                            (obj.z_cut - obj.tool_offset[tool_dia]),
+                            (obj.z_cut - abs(obj.tool_offset[tool_dia])),
                             self.app.defaults['units'].lower()
                         )
                     ],