message: Optimize list update speed on Windows
  Make the ID column fixed width, because in reality it is - IDs are
  immutable and change only when reloading the catalog. This makes
  invalidation of rows during updates (such as when modifying a
  translation) much faster, especially with large files.
diff: @@ -683,7 +683,11 @@ void PoeditListCtrl::UpdateColumns()
  m_colID->SetHidden(!m_displayIDs);
  if (m_displayIDs)
  + {
  + // determine best fitting width only once, then set it as fixed, because IDs are immutable
  m_colID->SetWidth(wxCOL_WIDTH_AUTOSIZE);
  + m_colID->SetWidth(m_colID->GetWidth());
  + }
  SizeColumns();
  