message: Win: *really* make Ctrl+A select all items in list
  Follow-up to it is not enough to implement selection, but we
  also need to enable the menu item appropriately. Without this fix, menu
  item's enabled state would still be affected by text control and
  disabled if the control was empty.
diff: @@ -536,6 +536,9 @@ PoeditListCtrl::PoeditListCtrl(wxWindow *parent, wxWindowID id, bool dispIDs)
  wxDataViewEvent le(wxEVT_DATAVIEW_SELECTION_CHANGED, this, GetSelection());
  ProcessWindowEvent(le);
  }, wxID_SELECTALL);
  + GetMainWindow()->Bind(wxEVT_UPDATE_UI, [=](wxUpdateUIEvent& e) {
  + e.Enable(GetItemCount() > 0);
  + }, wxID_SELECTALL);
  #endif
  Bind(wxEVT_SIZE, &PoeditListCtrl::OnSize, this);
  