Applied patch [ 651640 ] Toolbar sizing fix

Applied patch [ 651640 ] Toolbar sizing fix

This patch fixes the problem discussed on wx-dev
mailing list. (Message title "wxUniversal: How is the
parent notified when a child changes its size")

In short:
- This patch makes sure the toolbar notifies the parent of
any size change, this will give the parent the opportunity
to resize the frame client size and to make sure the
toolbar is in the right place.

Hans Van Leemputten

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18181 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775