- fixed some issues in Excellon Editor due of recent changes

- moved the Gerber colors fill in the AppObject.on_object_created() slot and fixed some minor issues here

defaults.py

@@ -2,7 +2,7 @@ import os
 import stat
 import sys
 from copy import deepcopy
-from Common import LoudDict, LoudUniqueList
+from Common import LoudDict
 from camlib import to_dict, CNCjob, Geometry
 import simplejson
 import logging
@@ -156,7 +156,7 @@ class FlatCAMDefaults:
         "gerber_plot": True,
         "gerber_solid": True,
         "gerber_multicolored": False,
-        "gerber_color_list": LoudUniqueList(),
+        "gerber_color_list": [],
         "gerber_store_color_list": True,
 
         "gerber_circle_steps": 64,