The changes of r71308 sent the event unconditionally in case the text didn't
really change but no events should be sent if the flags don't include
SetValue_SendEvent, add a check for it.
Re-closes #13936.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71417 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775