Improve field connection settings array creation ( recurse_pod_fields() )

[quasel]

Idea: only run recurse_pod_fields() once per pod for creating a "single" pods configuration array
then just "filter" it to create everything needed to avoid multiple recurse_pod_fields() calls with different filter options for the same "pod"

FLPageData::add_post_property( 'pods_multiple_photos_manual', $data );
FLPageData::add_post_property_settings_fields( 'pods_multiple_photos_manual', $form );