"Save" button isn't a default button on edit profile page

Test scenario #1

Precondition:
User must have Edit_own_profile permissions

Steps:
1) Sing in
2)Open profile page
3)3)Press "Edit Profile" button
4)Press [ENTER]

AR: Nothing happens
ER: Profile is saved

Test scenario #2

Precondition:
User must have Edit_other_profile permissions

Steps:
1) Sing in
2)Open profile page of any user
3)Press "Edit Profile" button
4)Press [ENTER]

AR: Nothing happens
ER: Profile is saved