table.wp-list-table .column-thumbnail{width:50px;text-align:center;white-space:nowrap}table.wp-list-table .column-thumbnail .gsf-columns-icon{font-size:15px;width:15px;height:15px}table.wp-list-table td.column-thumbnail img{margin:0;width:auto;height:auto;max-width:40px;max-height:40px;vertical-align:middle}