Test that approving student's request for help sends the students to the very next node, instead of two steps ahead.
Also fixed a similar issue where node was being sent multiple times when teacher locks/unlocks a lesson. This didn't result in any observable problems.
Test that approving student's request for help sends the students to the very next node, instead of two steps ahead.
Also fixed a similar issue where node was being sent multiple times when teacher locks/unlocks a lesson. This didn't result in any observable problems.
Closes #83