improvements to names tab and add/delete person functions

[Uncle Buddy]

Today's commit is full of important improvements. The main thrust of this commit consists of improvements to the names tab where the user can create and edit new names for an existing person. Also the new add person dialog was checked out more thoroughly and problems solved. The top menu Elements item now has a functioning command for deleting a person from the tree altogether. The big plus sign in the icon menu strip at top now opens the add person dialog. Many small bugs, glitches, and hiccups were fixed. The do list for this work was generated by creating more videos in the series which I've not yet posted, a series which is on Using Treebard to make a new family tree from scratch. See another thread I'll post next for more news about YouTube vs. Rumble vs. as a platform for Treebard's video channel.

Files modified in this commit:

families.py
persons.py
main.py
treebard_root_029.py
messages.py
query_strings.py
widgets.py
treebard.db
great_lakes_heatons.tbd