[texworks] New features and fixes to test

[Stefan Löffler]

Hi,

and another new (minor, long-requested) feature: an additional option to
close the output panel after successful typesetting (regardless of
whether is was open before or not).
This was introduced in r793 and fixes issue 415
(http://code.google.com/p/texworks/issues/detail?id=415).

Testing is (as always) welcome.

Regards,
Stefan