Deprecate .withChildren #80
Description
The first version of the Python 2 code I inherited was attempting to remove the withChildren parameters but looked unfinished;
I put them back to stop some Pycharm warnings and set them to False as some indicated in some commented out code; Seems like it should always be true and the boolean should be removed;
This might cause some unneeded redraws but the original code was from Python 2.x wxPython 2.x (2005); It is now 2020, Python 3, wxPython 4.x; I think speed improvements in both hardware and software may have overcome this.