Handling of cases where exercises with 0 minutes (or empty minutes fields) are used,
or when the full exam has no minutes specifed
- Provide a hint on lecturers dashboard for questions with 0 minutes
- Don't provide timer on the lecturers dashboard
- Don't provide timer for the students
- Don't show timer for very short exams/quizzes (below 1 minute)
- Provide a hint on lecturers dashboard when no timer is displayed
- When the countdown timer has expired more than a minute, display the text
that the timer has expired, rather than counting to negative values.
Hints:
* It is recommended to set the end-time of the exam manually,
when a time window is specified and the total exam time is provided as 0.
* When there is no timer, the special autosaving semantics for the end of the exam
will not work (trying to get a snapshort short before the exam end).
* When there is no time-budget, the time budget control ("be able" exams) won't work
- bumping version to 5.10.1d47
