message: Fix pre-translation progress messages
  Don't say "translate", it's misleading.
diff: @@ -108,7 +108,7 @@ bool PreTranslateCatalog(wxWindow *window, CatalogPtr catalog, const T& range, i
  if (op.get())
  {
  matches++;
  - progress.UpdateMessage(wxString::Format(wxPLURAL("Translated %u string", "Translated %u strings", matches), matches));
  + progress.UpdateMessage(wxString::Format(wxPLURAL("Pre-translated %u string", "Pre-translated %u strings", matches), matches));
  }
  }
  