- in Distance Plugin made sure that the 'big cursor' (when is used) is black in color (visible in most situations)
- in Distance Plugin, for the 2D graphic mode activated the utility line
- some more code is refactored in the Preferences
- the axis will now be drawn on the canvas as they were left in the previous run (just like the HUD and the Workspace)
- for processors with less than 4 cores now the default number of workers is 1 (changed from 2)
- some graphical settings go now directly to the defaults dictionary and will not pass through the `options` app dictionary
- 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
- some refactoring
- in a FCColorEntry GUI element, setting a color in the Color dialog will trigger the editingFinished signal therefore propagating the changes
- fixed the Tcl Command AlignDrillGrid
- fixed the Tcl COmmand Panelize, Excellon panelization section
- Fixed an issue in Tool Calibration export_excellon method call
- PEP8 corrections all over the app
- added a new string to the translatable strings
- fixed an error that sometime showed in Legacy Mode when moving the mouse outside canvas
- reactivated the shortcut key 'S' in TCL Shell, to close the shell dock when it was open (of course the focus has to be not on the command line)
- fixed the issue with factory_defaults being saved every time the app start
- fixed the preferences not being saved to a file when the Save button is pressed in Edit -> Preferences
- fixed and updated the Transform Tools in the Editors
