- fixed bug in Panelization Tool for which in case of Excellon objects, the panel kept a reference to the source object which created issues when moving or disabling/enabling the plots

- cleaned up the module imports throughout the app (the TclCommands are not yet verified)

FlatCAMPostProc.py

@@ -9,8 +9,6 @@
 from importlib.machinery import SourceFileLoader
 import os
 from abc import ABCMeta, abstractmethod
-from datetime import datetime
-import math
 
 # module-root dictionary of postprocessors
 import FlatCAMApp