Terry,

I just saw your note about waiting to split this into a Window and Frame class, which was after I had already gotten the PR ready.  I've been mostly offline for the past few days, so I had been working on those changes locally with the intent of pushing them once I was back online.  I understand if it's not a priority to review.  My main goal in splitting them was more for readability rather than for being able to add it to a Tabbed window.  As a follow up to this refactor, I had hoped to split the Basic and Advanced frames into their own tabs, mostly to clean up the create_widgets and to organize the supporting functions.

Anyway, PR11427 refactors the main frame from the window.