Collection barchart tooltip stats breakdown by medium, when available. (PP-728)

[tdilauro]

Description

• Adds breakdown by medium (when available) to collection inventory barchart tooltip.
• Removes the "self-hosted" metric from inventory and collection displays.

Note:

• Circulation Manager changes to provide a breakdown of inventory metrics by medium are introduced on circulation PR 1549.
• This version is backward compatible with older versions of the circulation manager that do not provide per-medium inventory breakouts. When the detail is not available, the breakdown is not provided in the UI.

Motivation and Context

Need for metrics by medium (book, audio, etc.) when reviewing inventory.

[Jira PP-728]

How Has This Been Tested?

• New tests added and small updates to existing tests.
• Manual local testing.
• All tests pass in development environment.
• CI tests passed for associated feature branch.

Checklist:

• I have updated the documentation accordingly.
• All new and existing tests passed.

[ray-lee]

This looks good to me!