Implemented safer mid point calculations and english names for the locals ([s]tart and [e]nd) on PerPixelUndoTask.IndexOfPixel() and PerPixelUndoTask.InternalRegisterPixel()
Added message for the pencil operation fix
Spedup PerPixelUndoTask.RegisterPixel() routine by removing call for PerPixelUndoTask.IndexOfPixel() and adding check for duplicated pixels right inside the PerPixelUndoTask.InternalRegisterPixel() method
Implemented Spray paint operation
Re-enabled 'Operation Size' properties portion of view
Updated changelog with spray paint inclusion