Different requirements during registry and password change

[eMKejTestingWarriors]

🐞 Describe the bug

There are things which are checking during account creating but not during password changing:

• a new password can be of any length while during registry the is a limit of characters;
• a new password can contains whitespace characters which cannot be added during registry.

What's more, if you change password in this way, you can change it again properly, but if you log out, then attempting to log in again fails.