Version 1.11

* new sync logic (preparation for Collection Sync, uses less memory)
* improved notifications
  - "retry" and "view item" actions for sync errors
  - I/O errors are shown as minimum priority notifications
* add start-up info dialog for vendor-specific auto-sync problems
* removed unnecessary permission activity (now handled by account activity)
* library updates (including okhttp 3.10 which should now be able to handle unexpected HTTP 100 status messages)
* various other improvements and bug fixes
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