Support pre-filled notes on the "New bookmark" form

[Kdecherf]

The "New bookmark" form (/bookmarks/new) currently supports some fields to be pre-filled through query params.

For example, going to /bookmarks/new?url=example.com&title=Hello%20World will show the form with URL and Title fields pre-filled with, respectively, example.com and Hello World.

Pre-filling seems to be available for the fields url, title and description but not for notes.

It would be wonderful to support pre-filling for notes as well.