Just moved id attributes to data-id.
Don't think it was such a critical issue as I thought before.

* Add typeWatcher for search form
* Replace `strlen` to `mb_strlen`, because we limit count of chars rather than count of bytes

* Fix search for students by 1-2 letters and with group filter

+ Add animation for modules swaps
+ Add always / error callbacks to $.post requests
+ Remove usages of deprecated variables & functions
+ Format code, apply naming conventions

+ Font awesome icons
+ Split js code into functions
+ Improved appearance

- Complex report optimization
- Max rate calculation optimization

After taking a new password, the button `change password` always comes `change login`.

- Login filtering
- Complex enter key behaviour
- Process loading icon

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