Pasting magnet link in search box should offer to add it as torrent to download

[axelsimon]

Is your feature request related to a problem? Please describe.
Currently, to add a torrent via its magnet link, it takes multiple steps:

• open barrage page
• click on the "+" menu icon
• click "magnet"
• paste
• hit enter

Describe the solution you'd like
This could be shortened to:

• open barrage
• paste
• hit enter

Describe alternatives you've considered
Can't see any.

Thanks!