Fix #44284

Test plan:
http://localhost:8000/exercises/constructions_1.html?debug&problem=bisector&seed=130&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%7B%5C%22center%5C%22%3A%7B%5C%22coord%5C%22%3A%5B1.3821044240733358%2C-0.6756954962136307%5D%7D%2C%5C%22radius%5C%22%3A3.054911223374956%7D%2C%7B%5C%22center%5C%22%3A%7B%5C%22coord%5C%22%3A%5B-1.3501793543244318%2C0.6600876843363889%5D%7D%2C%5C%22radius%5C%22%3A3.0028746954922076%7D%2C%7B%5C%22first%5C%22%3A%7B%5C%22coord%5C%22%3A%5B1.1203765504343803%2C2.3670176648243846%5D%7D%2C%5C%22second%5C%22%3A%7B%5C%22coord%5C%22%3A%5B-1.178506688074016%2C-2.3378757798322276%5D%7D%7D%5D%22%2C23%5D%2C%5B%22correct-activity%22%2C%22%5B%7B%5C%22center%5C%22%3A%7B%5C%22coord%5C%22%3A%5B1.3821044240733358%2C-0.6756954962136307%5D%7D%2C%5C%22radius%5C%22%3A3.054911223374956%7D%2C%7B%5C%22center%5C%22%3A%7B%5C%22coord%5C%22%3A%5B-1.3501793543244318%2C0.6600876843363889%5D%7D%2C%5C%22radius%5C%22%3A3.0028746954922076%7D%2C%7B%5C%22first%5C%22%3A%7B%5C%22coord%5C%22%3A%5B-1.1798492899935782%2C-2.3396894113710793%5D%7D%2C%5C%22second%5C%22%3A%7B%5C%22coord%5C%22%3A%5B1.1037872368516064%2C2.3665112893286073%5D%7D%7D%5D%22%2C11%5D%5D

Auditors: cbhl
newProblem gets fired on Exercises, not Khan.

Fixes debug mode.

Test plan:
locally, Chrome/OS X
- Visited http://localhost:8000/exercises/addition_1.html?debug and
  http://localhost:8000/exercises/angles_of_a_polygon.html?debug and clicked on
  problem history, random problem, and different problem types.

Auditors: eater, alpert
Run a Reprocess on #solutionarea to fix fonts

Closes #44265.

Test Plan:
Loaded /exercises/square_roots_2.html a bunch of times and it looked nice.

Auditors: eater, cbhl
Don't accept unanswered questions for basic_set_notation

Test plan:
In local mode,
- Leave the answer area blank and submit. Answer shouldn't be accepted.
- Enter something in the text box and submit. Answer should be marked wrong.
- Check the checkbox and leave the text box blank. Answer should be marked wrong.
- Enter something in the text box AND check the checkbox. Answer shouldn't be accepted.
- Enter the correct answer. Answer should be marked correct.

Auditors: cbhl