Izug.ticketbox

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- Fix sorting of possible responsible users.
[mathias.leimgruber]

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- Sort responsible managers in overview alphabetically.
[Julian Infanger]

- Fix getProperty problem if a user no longer exists.
[mathias.leimgruber]

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- Show issue submitter in ticket view.
[mathias.leimgruber]

- Fix donwload link for attachments, since the AT file widget has changed.
[mathias.leimgruber]

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- Fix editor in edit response view.
[jone]

- Remove buggy truncation: use the tabbed-view cropping.
[jone]

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- Add comment to notification email.
[jone]

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- Fix encoding bug when sending email notification of a context
where the responsible has a non ASCII-name.
[jone]