PREP: 6.1

again
ADD: Popular tab and update localization
ADD: Full size game backgrounds
ADD: Header Links
REWRITE: Inventory market price handler

Supports booster pack averages, all games, etc.  Is ported from the
existing Chrome code which Mozilla didn't like because of it's inclusion
of a script tag
ADD: Loading dialog to custom background select
FIX: Issue with subscription dialog and overlays
FIX: Purchase data bug when repurchasing
ADD: Name-only search result filter
FIX: Some code formatting
UPDATE: Localization
UPDATE: DRM warning for app/sub distinction
BUILD: 6.1