Updates December 01: UX improvements

UX improvements

• Add close button on summary popover (if summaries were long they were difficult to close on mobile)
• Show content directory on sign in if users don't yet have any subscriptions
• Simplified RSS subscriptions (comparison)
• Add an Archive all button to the inbox

Bug fixes

• Fixed RSS feed preview
• Fixed combining tag filters: when multiple tag filters where combined (e.g. includes tag1 and excludes tag2), after a page refresh the filters were incorrectly applied