Allow author to add/edit keywords during update

[alainna]

Is your feature request related to a problem? Please describe.

As a preprint submitting author, I want to update my preprint metadata to amend or remove my preprint's keywords, so relevant keywords are displayed with my preprint.

Describe the solution you'd like

Submitting author should be able to access the "keywords" field and be able to add/remove/change sorting of keywords when submitting a metadata request for approval of the moderator

[alainna]

I closed this by accident.