This doesn't seem to be necessary and is actually actively harmful, as
this code prevented tooltips from working with non-native windows, such
as those used inside wxSplitterWindow in the splitter sample.
Just remove this code entirely and add SetToolTip() calls to the sample
to show that they do work now.
Closes https://github.com/wxWidgets/wxWidgets/pull/1978Closes#14220.
ce4cb33c20