- 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
- most of the functions in the Geometry Editor are now multithreaded
- fixed the Subtract sub-tool in the Geometry Editor
- added an alternative Subtract sub-tool in the Geometry Editor, one that do not delete the subtracting shapes
- added some not-so-good icons for the Subtract Alt sub-tool in Geometry Editor
- replaced some icons in the app
- in Code Editor, when changing text, the Save Code button will change color (text and icon) to red and after save it will revert the color to the default one
- in Code Editor some methods rework
- added a label in status bar that will toggle the Preferences tab
- made some changes such that that the label in status bar for toggling the Preferences Tab will be updated in various cases of closing the tab
- Isolation Tool: reworked the GUI
- if there is a Gerber object selected then in Isolation Tool the Gerber object combobox will show that object name as current
- fixed the Shortcuts Tab to reflect the actual current shortcut keys
- started to work on moving the Isolation Routing from the Gerber Object UI to it's own tool
- moved all the 'share' resources (icons) to the 'assets/resources' folder
- some more fixes to problems generated by latest changes in the open handlers
- modified the make_freezed.py script for the new location of the icons
- added a fix for the ConnectionRefusedError in Linux that is issued when first running after a FlatCAM crash
