Rename PrimaryKeyItem to TypedDataItem.

Rename PrimaryKeyItem to TypedDataItem.

The name PrimaryKeyItem suggests what the class should be used for.
TypedDataItem is a neutral name that describes the class better.

This is a rename-only refactor.

* src/main/java/org/glom/web/client/OnlineGlomService.java:
* src/main/java/org/glom/web/client/OnlineGlomServiceAsync.java:
* src/main/java/org/glom/web/client/Utils.java:
* src/main/java/org/glom/web/client/activity/DetailsActivity.java:
* src/main/java/org/glom/web/client/place/DetailsPlace.java:
* src/main/java/org/glom/web/client/ui/ListViewImpl.java:
* src/main/java/org/glom/web/client/ui/details/RelatedListTable.java:
* src/main/java/org/glom/web/client/ui/list/ListTable.java:
* src/main/java/org/glom/web/server/ConfiguredDocument.java:
* src/main/java/org/glom/web/server/OnlineGlomServiceImpl.java:
* src/main/java/org/glom/web/server/Utils.java:
* src/main/java/org/glom/web/server/database/DetailsDBAccess.java:
* src/main/java/org/glom/web/server/database/RelatedListDBAccess.java:
* src/main/java/org/glom/web/server/database/RelatedListNavigation.java:
* src/main/java/org/glom/web/shared/NavigationRecord.java: