Session requests where attributes should be 'not null' are not clearly explained in the UX

[ivard]

In the flow, it is possible to request optional attributes that may be 'not null.' For this purpose, a design has been created that needs to be implemented so that this exception can be handled. Important: It is optional in the credential, but the verifier can request this (specifically not null).

https://irma.app/docs/session-requests/#null-attributes

Note: It may be necessary to make changes in the bloc as well.

Design ideas: