Use ProcessEventLocally() instead of ProcessEventHere() in docview code.

Use ProcessEventLocally() instead of ProcessEventHere() in docview code.

Use wxEvtHandler::ProcessEventLocally() instead of ProcessEventHere() when
forwarding events in the docview code. This ensures that any event handlers
chained with the objects involved (document manager, document, view) will be
used.

Incidentally the old code didn't work at all as ProcessEventHere() didn't even
call TryBefore() where the (further) forwarding was implemented.

Closes #10640.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@64263 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775