- replaced the testing if instance of FlatCAMObj with testing the obj.kind attribute

- removed the import of the whole FlatCAMApp file only for the usage of GracefulException
- remove the import of FlatCAMApp and used alternate ways
- optimized the imports in some files
- moved the Bookmarksmanager and ToolDB classes into their own files
- solved some bugs that were not so visible in the Editors and HPGL parser
- split the FlatCAMObj file into multiple files located in the flatcamObjects folder and renamed the contained classes with names more suggestive
- updated the Google Translation for the German language

camlib.py

@@ -4318,7 +4318,7 @@ class CNCjob(Geometry):
 
         log.debug("Finishing SolderPste G-Code... %s paths traced." % path_count)
         self.app.inform.emit(
-            '%s... %s %s' % (_("Finished SolderPste G-Code generation"), str(path_count), _("paths traced."))
+            '%s... %s %s' % (_("Finished SolderPaste G-Code generation"), str(path_count), _("paths traced."))
         )
 
         # Finish