no issue
- the `ella-sparse-array` dependency used for the sparsely populated list on the members screen creates ProxyObjects that wrap the underlying member model instances meaning the forced use of `.get()` and `.set()` required by ProxyObject was leaking through to other areas of the app causing a mismatch in code patterns
- moved the loading state for each member into a separate component and put the loading conditional directly inside the `{{#each members}}` block so that we can pass the real model instance through to components via `{{member.content}}` rather than passing the ProxyObject wrapper, avoiding unexpected errors when not using `.get()` and `.set()` on member arguments
no issue
- member records are not re-fetched when navigating from the members list to the member details screen, instead the already loaded member object is passed through to the route directly to provide a faster navigation experience
- however, the objects used in the member list are proxy objects in order to support the lazy-loading infinite scroll. Proxy objects require the use of `get()` so errors were thrown when the newsletter subscription toggles were used
refs https://github.com/TryGhost/Team/issues/1492
Allows site owners to manage member's newsletter preference directly in Admin.
- also adds `visibility` property for newsletter model
- updates members test model to include `visibility`