- 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

tclCommands/TclCommandBbox.py

@@ -1,6 +1,5 @@
 import collections
 from tclCommands.TclCommand import TclCommand
-from FlatCAMObj import FlatCAMGeometry, FlatCAMGerber
 
 from shapely.ops import cascaded_union
 
@@ -73,7 +72,7 @@ class TclCommandBbox(TclCommand):
 
         if not isinstance(obj, FlatCAMGerber) and not isinstance(obj, FlatCAMGeometry):
             self.raise_tcl_error('%s %s: %s.' % (
-                _("Expected FlatCAMGerber or FlatCAMGeometry, got"), name, type(obj)))
+                _("Expected GerberObject or GeometryObject, got"), name, type(obj)))
 
         if 'margin' not in args:
             args['margin'] = float(self.app.defaults["gerber_bboxmargin"])
@@ -92,7 +91,7 @@ class TclCommandBbox(TclCommand):
 
         try:
             def geo_init(geo_obj, app_obj):
-                assert isinstance(geo_obj, FlatCAMGeometry)
+                # assert geo_obj.kind == 'geometry'
 
                 # Bounding box with rounded corners
                 geo = cascaded_union(obj.solid_geometry)