Merge pull request #2 from michaelkanis/master

Fix typo and add some shortcuts, thank you Michael!
* Updated libtransmission to 2.76
* Fixed issue #1
Make text field for link wider, is there any reason why this was commented out?
Make the text field have fokus so you can immediately paste
Make 'Open' button default, so you can confirm by presing enter
Automatically paste magnet links that have been copied to the system clipboard
Make magnet dialog look and feel like all the other dialogs for consistency