- modified the ToolDB class and changed some strings - Preferences classes now have access to the App attributes through app.setup_obj_classes() method - moved app.setup_obj_classes() upper in the App.__init__() - added a new Preferences setting allowing to modify the mouse cursor color - remade the GUI in Preferences -> General grouping the settings in a more clear way - made available the Jump To function in Excellon Editor - added a clean_up() method in all the Editor Tools that need it, to be run when aborting using the ESC key