Media Library Drop Down Filter For All Uploaded To

Hello,

The Media Library on some sites on a WP MS 4.3.1 MS Network display a drop down for "All uploaded to" and others do not.

The sites have the same plugin sets active and the same snippets, so I am lost as to the origin of this additional drop down in the media library and I would like to add it to other sites.

I am confused about the origin of this additional drop down and unsure how to determine it.

I thought perhaps the plugin Enhanced Media Library spawned it, but deactivating it the drop down remains.

I thought perhaps the plugin Media Library Assistant spawned it, but deactivating it the drop down remains.

Any help will be appreciated.