[Bug] Dividing by Zero in the Header

[joe9663]

Describe the bug
DreamHost contacted us about an issue loading the Customizer. User's site was returning a DivideByZeroError on class-boldgrid-framework-control-col-width.php:119

Add error handling to ensure that we don't break existence if $items_in_row evaluates to zero.

if count( $row['items'] ) === 0 : continue

[joe9663]

@jamesros161 Another DreamHost user reported this same issue today. Rolling back to PHP 7.4 fixed the problem for them too.