Draft: Fixed py3 compatibility issues

src/Mod/Draft/DraftGui.py

@@ -118,8 +118,9 @@ class todo:
         todo.itinerary = []
         if todo.commitlist:
             for name,func in todo.commitlist:
-                if isinstance(name,unicode):
-                    name = name.encode("utf8")
+                if sys.version_info.major < 3:
+                    if isinstance(name,unicode):
+                        name = name.encode("utf8")
                 #print("debug: committing ",str(name))
                 try:
                     name = str(name)

src/Mod/Draft/DraftTools.py

@@ -538,8 +538,9 @@ class Line(Creator):
                 self.ui.wireUi(name)
             else:
                 self.ui.lineUi(name)
-            if isinstance(self.featureName,unicode):
-                self.featureName = self.featureName.encode("utf8")
+            if sys.version_info.major < 3:
+                if isinstance(self.featureName,unicode):
+                    self.featureName = self.featureName.encode("utf8")
             self.obj=self.doc.addObject("Part::Feature",self.featureName)
             # self.obj.ViewObject.Selectable = False
             Draft.formatObject(self.obj)