- 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
- in Distance Plugin added the cleanup after the Plugin is closed from the Tab close button
- renamed the Distance Minimum Plugin to Object Distance; started to add new functionality on this Plugin: to calculate the distance between the bounding box centers too
- in Distance Plugin - implemented a new feature: multi segment distance measurement
- in Distance Plugin - the Dx, Dy, Angle and Distance values are updated real time (for non multi segment measurement)
- in 2Sided Plugin: duplicated set of coordinates in Alignment Drills are removed
- in 2Sided Plugin: Shift+LMB will add automatically the clicked coordinates in the Alignment Drills location
- working on Milling Tool and Drilling Tool: made sure that the plugin UI is initialized only when the plugin (Tool) is run in order to avoid errors like (wrapped C++ objects was deleted)
- for all the plugins optimized the plugin name
- renamed the app to FlatCAM Evo in order to make a difference from FlatCAM app which follows its own path
- modified the splash image to reflect the new naming of the app
- modified some of the documents (License, Readme) in the app to reflect the actual reality in 2021
- 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
