- 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)

appGUI/PlotCanvasLegacy.py

@@ -650,7 +650,7 @@ class PlotCanvasLegacy(QtCore.QObject):
         if self.app.options["global_cursor_color_enabled"]:
             color = self.app.options["global_cursor_color"]
         else:
-            if self.app.options['global_theme'] == 'light':
+            if self.app.options['global_theme'] in ['default', 'light']:
                 color = '#000000'
             else:
                 color = '#FFFFFF'
@@ -705,7 +705,7 @@ class PlotCanvasLegacy(QtCore.QObject):
         if color:
             color = color
         else:
-            if self.app.options['global_theme'] == 'light':
+            if self.app.options['global_theme'] in ['default', 'light']:
                 color = '#000000'
             else:
                 color = '#FFFFFF'
@@ -748,7 +748,7 @@ class PlotCanvasLegacy(QtCore.QObject):
         self.canvas.blit(self.axes.bbox)
 
     def clear_cursor(self, state):
-        if self.app.options['global_theme'] == 'light':
+        if self.app.options['global_theme'] in ['default', 'light']:
             color = '#000000'
         else:
             color = '#FFFFFF'