- fixed some leftovers due of recent changes in the theme management

- added a new feature (new modules are required) in the Image Plugin (Menu -> File -> Import -> Import Image) that allow tracing images. This may allow engraving pictures.
- started to add UI's for the Excellon Editor Tools (really early work)

camlib.py

@@ -7192,7 +7192,7 @@ class CNCjob(Geometry):
             return
 
         try:
-            if self.app.options['global_theme'] == 'light':
+            if self.app.options['global_theme'] in ['default', 'light']:
                 obj.annotation.set(text=text, pos=pos, visible=obj.obj_options['plot'],
                                    font_size=self.app.options["cncjob_annotation_fontsize"],
                                    color=self.app.options["cncjob_annotation_fontcolor"])