Upgrade to H5Web version 15.0.0

[Dagonite]

Closes None (fix of a previous PR).

Description

Version change required adding fetcher function for retrieving data/metadata from a h5grove back-end as axiosConfig prop no longer supported.

[Dagonite]

If you're getting console warnings about outdated local preferences, run this:

Object.keys(localStorage).filter(k => k.startsWith("h5web:")).forEach(k => localStorage.removeItem(k));
localStorage.removeItem("data-viewer:h5web-storage-cleared");
location.reload();