Change Search Settings/Torrent/Deluge option texts for improved understanding

Deluge uses WebUI to connect to deluge daemon, lets make sure that the
user knows what to enter. Also the WebUI doesn't use a username at all,
so we can hide that field so that the user doesn't get confused
Merge pull request #130 from adam111316/feature/deluge_labels

Change Search Settings/Torrent/Deluge option texts for improved understa...