Add Optionds to Layout Builder

[Jeremy Hopkins]

We should add more settings for the layout builders, these can be added to line 984 of array_definitions.php:

$bootstrap12 = array(

The additional values we can add are:

• 3 4 5
• 4 3 5
• 3 5 4
• 4 5 3
• 5 3 4
• 5 4 3

We would also need corresponding images to be added to /pix/layout-builder