MDL-35745 quiz: let teachers to re-open a Never submitted attempt
In the quiz reports, for any 'Never submitted' attempt, there is
now a 'Re-open' button next to where it says the attempt state.
If that is clicked, there is an 'Are you sure?' pop-up. If the user
continues, the attempt is reopened. If the student now has time left,
the attempt is put into the In progress state. If there is not time
left the attempt is immediately submitted and graded. The
'Are you sure? pop-up says which of those two things will happen.
18 files changed:
