- 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
- added ability to turn off the outline plotting for Gerber objects (will speed up the plotting but the plotting visual quality will degrade); controlled from Preferences -> Gerber -> General
- plotting visuals in 3d graphic mode will no longer create some unnecessary lists
- fixed crash when trying to do a `select all` and there are app Scripts present
- updated the `drillcncjob` Tcl command to make a script exit in case of an error
- attempting to add a feature in the text editors to autoselect all words in a document that are the same as the one that was clicked
- all the colors set in Preferences now have to be in the 8digits format RGBA (including the alpha channel as a suffix) - it is required to delete the current preferences files
- trying to solve differently RuntimeError exceptions that randomly popup due of wrapped C++ objects being deleted by attempting to create a new UI for the objects
- fixed the multiple selection in the Project Tab collection list; now only a single selection will trigger the signal 'proj_selection_changed'
- when Milling Plugin is opened, selecting an Excelon object will set the GUI to Excellon Target
- bypassed a bug in FlatCAM Gerber UI - its not really fixed (it's a crash in build UI when disconnecting signals due of the wrapped C++ object already destroyed)
- added a new preprocessor named 'Check_points' which is to be used to check if the PCB is well aligned in position (used by at least the Corners Tool)
- Tool Corners - added a new feature that creates a verification GCode by moving in the locations positions; modfied the UI a bit
- Drilling Tool - removed the mandatory Toolchange event added even if the Toolchange was not selected
- Excellon and Geometry objects no longer have the self.options dict overwritten with the application defaults
- Drilling Tool - first tool that benefit from using the object options instead of application defaults; this is useful if an object is recreated on project load
- Drilling Tool - fixed it to update the UI form also for common parameters on object change
- 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
- modified the Properties Tab for various FlatCAM objects preparing the move of Properties Tool data into the Properties Tab
- if the Properties tab is in focus (selected) when a new object is created then it is automatically selected therefore it's properties will be populated
- 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
