R1:83672ba949fb

Allow to prefill name and description fields of a new Passphrase

Summary:
Allow to prefill name and description fields of a new Passphrase

Closes T15142

Test Plan:
I've visited this URL in my local test installation:

/passphrase/edit/?type=password&username=user&name=super&description=mario

And I was able to see the Name and Description fields prefilled,
just like the username.

I also tried to put the query string on an already-existing element
and it was working as expected, so, without any…