Fixed keyboard navigation in generic tree control.

Under MSW any cursor key presses would not be handled by the generic tree control (and it would lose focus). Added the style wxWANTS_CHARS to the creation of wxGenericTreeCtrl to fix keyboard navigation.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70371 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/treectlg.cpp

@@ -997,7 +997,7 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
 #endif
 
     if ( !wxControl::Create( parent, id, pos, size,
-                             style|wxHSCROLL|wxVSCROLL,
+                             style|wxHSCROLL|wxVSCROLL|wxWANTS_CHARS,
                              validator,
                              name ) )
         return false;