Verify that external modules can extend checkout process

[Hlavtox]

Check if this works - https://github.com/TeamEver/everpsorderoptions

[tswfi]

Did it work?

[CySSoO]

Hello,
I'm the developer of this module. There are no longer any overrides used; the module uses a native PrestaShop hook.
The same hook is used here.
https://github.com/TeamEver/everblock
For me this issue should be closed, and in the worst case an issue should be opened on the repository of the mentioned module