name from presenter class for select field

[pLavrenov]

Fixes # RelationController.php

[tabuna]

Could you add a test?
It seems that this change makes having a Presentor mandatory for the model.

[pLavrenov]

Yes, my mistake, need only check for the presence of the field.

Added a change to the code and now you can set the name via getAttribute() in Model

For example:

`
public function presenter(): CustomerPresenter
{
return new CustomerPresenter($this);
}

public function getFullNameAttribute(): string
{
return $this->presenter()->fullName();
}
`