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PRs included in this patch: - #1002: Fix bug 1393257: Stop in-progress studies when opt-out pref changes. https://github.com/mozilla/normandy/pull/1002 - #1010: Bug 1392738: Update how we open the new preferences UI. https://github.com/mozilla/normandy/pull/1010 - #1024: Bug 1371350: Delay almost all startup tasks until after sessionstore-windows-restored https://github.com/mozilla/normandy/pull/1024 - #1029: Fix #856: Add type parameter to preference experiment annotations. https://github.com/mozilla/normandy/pull/1029 MozReview-Commit-ID: 7T3MgLMMsiE