deposit: Save draft before creating/resubmitting a curation request

[rekt-hard]

closes #23

Using good ol' vanilla js, first the save draft button is obtained from the document. Then the click action is called on the html element. It is assumed that only one element with the name save is present and this element is the save button.

This also handles all the state changing of the button, ensuring correct rendering.

Screencast.from.2024-10-03.12.11.27.webm

[max-moser]

for obvious reasons this is not exactly ideal, but from a practical point of view i'd say that it'll do for now.

thanks a lot for checking this out!