Files displayed together because of APIS

[jcowey]

https://papyri.info/ddbdp/p.mich;15;738

and

https://papyri.info/ddbdp/p.mich;15;739

are presumably displayed together because they share and APIS record.

https://github.com/papyri/idp.data/blob/master/APIS/michigan/xml/michigan.apis.1946.xml belongs to https://papyri.info/ddbdp/p.mich;15;739

@LaviniaFerretti would you please sort the idnos.

https://github.com/papyri/idp.data/blob/master/APIS/michigan/xml/michigan.apis.1946.xml needs

TM / HGV / ddb-hybrid / ddb-filename idnos

https://github.com/papyri/idp.data/blob/master/APIS/michigan/xml/michigan.apis.1945.xml

remove 37333 and p.mich;15;739