Update CustomColumn.php
Update CustomColumn.php

Column ids are missing since 5.7.5.
Columns with a custom width don't work without this.
TimDix/concrete5,avdevs/concrete5,avdevs/concrete5,matt9mg/concrete5,TimDix/concrete5,MichaelMaar/concrete5,avdevs/concrete5,TimDix/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,matt9mg/concrete5,MichaelMaar/concrete5