Update wxPython to 4.2.3 #19080
Closes #17751
Summary of the issue:
Solving #12224 required introducing a hack to fix wx.lib.scrolledpanel.ScrolledPanel.
This has now been fixed in wxPython 4.2.3: wxWidgets/Phoenix#1950.
As such, we can revert the hack now
Description of user facing changes:
None
Description of developer facing changes:
wxPython has been updated, this can cause API breaking changes sometimes
Support class has been removed.
