table.wp-list-table th.column-board,
table.wp-list-table th.column-content_type,
table.wp-list-table th.column-created_at,
table.wp-list-table th.column-status {
    width: 13%;
}

.tablenav #cronycle_content_reset.button
{
    margin: 1px 8px 3px 0;
}