LDEV-1373: Put Mark and Question Number on separate lines in class export portfolio to make narrower columns. Then if there are lots of questions, more questions will fit on the normal page width.
LDEV-1302: Improving the performance in learner by improving the user attempt calls to the database and removing some of the iterations in the logic that made more database calls than necessary. LDEV-1304: Fixing up the marking, which was incorrect if questions were worth more than 1.