Generate wxUpdateUIEvent for the ribbon buttons to allow updating their state
using wxEVT_UPDATE_UI. Also update the same to show this.
Closes#12003.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70180 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775