3c908f1df0
Review at HEAD 7286d320. AdminUI-002: IsValidJson null/blank -> friendly error (was
ArgumentNullException). AdminUI-003: DriverStatusPanel Reconnect/Restart dispose CTS (build-
verified, live /run deferred). AdminUI-005: HistorianWonderware picker URL-encodes tag name.
AdminUI-008: Format round-trip test. 001 (script-page authz) + 004 (hub [Authorize]) left
Open as cross-cutting w/ Host/Security.