Since it is my fix, I will write the PR.  But first, please test part 2, changing '0' to '0:1', just to make sure it works.

c1b added 'None,' (for separater bar) after the configdialog entry.  When the configdialog entry is removed, the None should be also.  On Windows, a menu that starts with None starts with a visible bar.  On my Mac Mohave, and perhaps on your machine, it is supressed.  But a) I would rather have the data structure match what is shown, and b) we cannot know if the supression occurs on all versions of macOS and predecessors.