- the application now uses only the default values from the app.options dict, the app.defaults dict holds the definitive default values

- fixed some outstanding issues from the PyQt6 port
- PEP8 fixes
- minor fixes
- updated the saving of Preferences to update the self.options too: the `Apply` action will update the self.options but the `Save` action will save the updated preferences to the file on disk

appObjects/FlatCAMObj.py

@@ -105,8 +105,8 @@ class FlatCAMObj(QtCore.QObject):
         self.deleted = False
 
         try:
-            self._drawing_tolerance = float(self.app.defaults["global_tolerance"]) if \
-                self.app.defaults["global_tolerance"] else 0.001
+            self._drawing_tolerance = float(self.app.options["global_tolerance"]) if \
+                self.app.options["global_tolerance"] else 0.001
         except ValueError:
             self._drawing_tolerance = 0.001
 
@@ -493,12 +493,12 @@ class FlatCAMObj(QtCore.QObject):
         used file extension as the first one in the special string
 
         :param last_ext:        The file extension that was last used to save a file
-        :param filter_string:   A key in self.app.defaults that holds a string with the filter from QFileDialog
+        :param filter_string:   A key in self.app.options that holds a string with the filter from QFileDialog
         used when saving a file
         :return:                None
         """
 
-        filters = copy(self.app.defaults[filter_string])
+        filters = copy(self.app.options[filter_string])
         filter_list = filters.split(';;')
         filter_list_enum_1 = enumerate(filter_list)
 
@@ -521,7 +521,7 @@ class FlatCAMObj(QtCore.QObject):
                 # add back the element that should always be the last (All Files)
                 filter_list.append(last_elem)
 
-                self.app.defaults[filter_string] = ';;'.join(filter_list)
+                self.app.options[filter_string] = ';;'.join(filter_list)
                 return
 
     def add_properties_items(self, obj, treeWidget):
@@ -536,7 +536,7 @@ class FlatCAMObj(QtCore.QObject):
         font = QtGui.QFont()
         font.setBold(True)
 
-        p_color = QtGui.QColor("#000000") if self.app.defaults['global_gray_icons'] is False \
+        p_color = QtGui.QColor("#000000") if self.app.options['global_gray_icons'] is False \
             else QtGui.QColor("#FFFFFF")
 
         # main Items categories