Bug fixes:
- Fixed the ad-blocker warning showing for everyone regardless of whether a blocker was present (one of the probe domains no longer existed, which made the check always report "blocked").
- Fixed the once-a-day shop-list refresh not firing reliably on long-running sessions; the refresh alarm is no longer reset on every background wake-up.

Hardening:
- The "shop via portal" link now only accepts an https clickthrough URL from the API.