Reorder sections list in Customiser "Add Section" popup (OS 2.0)

I am looking for a way to change the order in which sections are loaded in the “Add Section” popup modal.

To use the below example, I would want to move “Custom Content” above “Customer Testimonials” as it’s used more frequently.

Can anyone help me?

I had assumed they might be alphabetical but I can’t seem to find documentation on this.