Add timezone support
This feature adds support for setting a timezone per course edition.
By default the timezone will be the timezone of the server, i.e., Central European (Summer) Time.
When setting a different time zone, the dates/times displayed in the course edition will be converted to the selected timezone.
The actual moment in time of deadlines/extensions/etc won't change when changing the time zone, only the projection of these timestamps will change.Submitted by Elmer van Chastelet on 6 February 2017 at 14:53