The changes (cosmetic renaming, no less) in r64436 broke unit tests checking
for wxComboBox event generation because the extra text updated events were not
suppressed correctly any longer because wrong {Enable,Disable}Events() were
called instead of the correct GTK{Enable,Disable}Events().
Fix and slightly improve the code by disabling the events in overridden
EnableTextChangedEvents() itself and reuse its code from GTK-specific event
enabling functions.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64916 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
b526f9d64d