Torrent file list won't refresh after the torrent gets downloaded using magnet link

[dwatzke]

To reproduce the bug:

1. add a magnet link
2. quickly go to the transfer file list - it's not empty as expected
3. but wait a second - it gets downloaded and then the list is still empty

the issue here is that the file list doesn't get refreshed - it's got a simple workaround: you have to switch to other tab and then return back again, but it's a bug nevertheless