[frontend] [UX] Intermediary preview of the data that a user has filled in

[catileptic]

As a user, I want to see a intermediary preview of all the data that I have filled in, with the asset declaration still visible on the side, in order to double-check whether I entered the data correctly.

[radu-diaconescu13]

I'm taking this

[radu-diaconescu13]

Implementing this strictly using django could require modifying the moonsheep flow which can lead to maintenance problems down the road.
A cleaner way would be to use javascript for the forms part instead of django, making it easier to implement the preview/edit view and other stuff.