Revert display for objectCount

[mikejritter]

What does this do?
Revert the display for objectCount to numberOfObjects

Why are we doing this? (with JIRA link)
Jira: https://collectionspace.atlassian.net/browse/DRYD-1405

For material order, object count is aligned with library holdings and as such is better thought of with the pre-8.0 numberOfObjects.

How should this be tested? Do these changes have associated tests?

• Run the devserver
• See Number of objects under object name
• Verify that Number of objects can save/load

Dependencies for merging? Releasing to production?
Since this is relabeling the objectCount field, it might be good to update other messages so that search and export are consistent.

Has the application documentation been updated for these changes?
No, but I believe the chanelog will need be updated to reflect this.

Did someone actually run this code to verify it works?
@mikejritter tested locally

[ray-lee]

This almost works. The field displays and saves on the record editor, but selecting and performing a search on the field in advanced search doesn't work. You can actually do this using ONE WEIRD TRICK!

[ray-lee]

For the search page, the field.collectionobjects_common.objectCount.fullName and field.collectionobjects_common.objectCount.name messages need to be set to 'Number of objects'. You don't need to change field.collectionobjects_common.objectCountGroup.name, because of the trick...

[ray-lee]

This is the thing that causes search to break. In order to generate the right search query, we need to know that objectCountGroup is repeating, so this needs to stay true. The trick is to make it not repeating only in the form.

[ray-lee]

We also don't need this, because of the trick.

[ray-lee]

Here's the trick. We just want to render a field that displays the objectCount from the first objectCountGroup, without rendering anything for the intervening fields. This is how to do that:

<Field name="objectCount" subpath={["ns2:collectionobjects_common", "objectCountGroupList", "objectCountGroup", "0"]} />

The subpath prop refers to the path under the enclosing field (in this case, <Field name="document">) in which to find this field. It effectively specifies intervening fields that you want to skip over rendering.