wxWindow::DoPopupMenu and for the application main loop.
Implemented wxWakeUpIdle.
Fixed crash when a popup menu entry is used to close/destroy the parent
window of the menu.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@19078 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775