Expand block buttons in blueprint editor don't work

Bug Description

The cute little buttons for expanding the block in the blueprint editor don't do anything.

How to Reproduce

You could try and click them.

Extra Detail

Environment

Statamic version: 3.0.0.-beta-33

PHP version: 7.4.6

Install method (choose one):

• Fresh install from statamic/statamic

[jasonvarga]

Very kind of you to soften the blow by saying the buttons are cute.