Client js tried to get (incorrectly) discipline id from URL and got error at the server side.

Link with name "Back to rating". The bug was caused by editing some routes.

1) exam page: hide hidden div with ( json data )
2) update session info on profile/settings changes (User.php)
3) fix profile page model ( Model_Teacher )
4) fix change discipline's control type ( sql )
5) fix sql response in bind group ( repeated binding problem )

2) forbid exam for students with <38

2. Страница авторизации [в разработке]
3. Страница предмета для зачета

+ оптимизация
+ добавил json_settings [переменная js], в котором (StudyGroupID_Filter и ID дисциплины)