The View dropdown drives row density and whether the Member and Address
fields render as composite cells or split into their underlying columns;
the column manager toggles visibility and resets to the curated default.
All choices persist per browser through the URL/session/cookie/global
chain, so a saved layout survives reloads without a per-account store.
Read 'fields' from URI when conn.params has no query (e.g. full page load).
When ?fields=... is present use URL-only selection so columns are not
merged with global settings. Fall back to session+global when URL has
only invalid field names.
