margin box groups don't increase dimension to fit their children
In this example div.pagedjs_margin-top-center stays at height of 96px while its div.pagedjs_margin-content got a height of 126px. As I understand "rendering of margin boxes" https://pagedjs.org/documentation/7-generated-content-in-margin-boxes/ this shouldn't happen. Here is a minimised example index.html or for your convenience here: https://codepen.io/ideesnoires/pen/VwGOKZr
Background: I'm using Paged.js to create letter and invoice templates with varying header dimensions and would like to use one dynamic template for all occasions and not resort to different templates for header with logo vs without.