- updated the Milling Plugin and all the related parts in the CNCJob Object and in all preprocessors. Now, the parent 'tools' attribute is inherited and also the GCode is stored here

- made sure that old projects load but without the CNCjob objects which would have crashed the app due different data structures
- the FlatCAm Evo projects load now in succession, no longer on threads

camlib.py

@@ -7603,8 +7603,9 @@ class CNCjob(Geometry):
             miny = np.Inf
             maxx = -np.Inf
             maxy = -np.Inf
-            if self.cnc_tools:
-                for k, v in self.cnc_tools.items():
+            # for CNCJob objects made from Gerber or Geometry objects
+            if self.options['type'].lower() == 'geometry':
+                for k, v in self.tools.items():
                     minx = np.Inf
                     miny = np.Inf
                     maxx = -np.Inf
@@ -7807,7 +7808,8 @@ class CNCjob(Geometry):
 
             self.create_geometry()
         else:
-            for k, v in self.cnc_tools.items():
+            # for CNCJob objects made from Geometry objects
+            for k, v in self.tools.items():
                 # scale Gcode
                 v['gcode'] = scale_g(v['gcode'])
 
@@ -7915,7 +7917,8 @@ class CNCjob(Geometry):
 
             self.create_geometry()
         else:
-            for k, v in self.cnc_tools.items():
+            # for CNCJob objects made from Gerber or Geometry objects
+            for k, v in self.tools.items():
                 # offset Gcode
                 v['gcode'] = offset_g(v['gcode'])