Fix RTD and CI

[markcmiller86]

• Found and fixed some minor issues with generic macros including a UMR
• Fix a leak of properties in the property-list interface

[markcmiller86]

This PR was originally created (with branch mcm86-15may23-prop-leak) to fix a leak in the property interface. However, the fixes for that went into the main branch via another PR. So, when main was merged into the branch associated with this PR, the changes for the property leak we effectively removed because they were already on main.

Subsequently, I fixed some issues with both ReadTheDocs and CI. The windows CI was failing due to bad URL to HDF5 windows binary release. I was not able to find URL for the version originally used and so updated slightly which then also involved an update for Visual Studio.

All that said, the windows CI seems to randomly fail. I re-ran the failed job here a couple of times to get it to pass.