[Create key for account] Need to add the length limitation for the name field and the password in the keys creation process.

[askolesov]

Severity: enhancement

Build info: 1b99283

Overview:
Need to add the length limitation for the name field and the password in the keys creation process.
Actually, name and password values are not limited.
It is suggested to make the next limitations that must be discussed:

• the maximum available length for the name field is near 50 -255 symbols.
• the maximum available length for the password field is near 255 symbols.

By @julia-aksyanova