code: protected void initMaxCellWidth() {
  
          m_maxCellWidth = m_opener.getOffsetWidth() - 2 /*border*/;
          for (Widget widget : m_selector) {
              if (widget instanceof A_CmsSelectCell) {
                  int cellWidth = ((A_CmsSelectCell)widget).getRequiredWidth();
                  if (cellWidth > m_maxCellWidth) {
                      m_maxCellWidth = cellWidth;
                  }
              }
          }
      }
docs: Initializes the selector width.<p>