more testing with 10,000 users

- runs usergen.php to generate users and insert results (modify
settings in the file to set student amount and the exam theyre being
inserted into)
- fixed apprise to try show a secodn window if one is already open
(causing weird display bugs)
- fixed bug where attempting to edit settings of a released exams still
went through even if a student began writing it and it displayed a
message saying the settings are now undeditable