- 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