- 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
- trying to separate the Preferences settings from App init and to make them dependent on the self.defaults dictionary
- updated the language strings from the source
- 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
