Changed how the dynamic event tables (used for all Python wx classes,

Changed how the dynamic event tables (used for all Python wx classes,
C++ wx classes typically use static event tables) are searched such
that they behave from a Python perspective more like the static tables
in C++.  Namely that if there are identical event bindings in a base
Python class and a derived Python class that the one in the derived
class will be found first and that if Skip is called that the one in
the base class will still be found instead of skipping directly to the
static stable in the C++ class.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19315 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775