worker_proposal_object has too many fields

[afalaleev]

        account_name_type author;
        shared_string permlink;
        worker_proposal_type type;
        worker_proposal_state state;
        account_name_type approved_techspec_author;
        shared_string approved_techspec_permlink;
        time_point_sec created;   // not required for consensus
        time_point_sec modified; // not required for consensus
        share_type net_rshares;  // not required for consensus
    };