[Merge] lp:~boiko/messaging-app/remove_proxies into lp:messaging-app

[Gustavo Pichorim Boiko]

The proposal to merge lp:~boiko/messaging-app/remove_proxies into lp:messaging-app has been updated.

Description changed to:

Remove the proxies that were being used for sorting and grouping of threads and messages. The functionality is implemented directly on history models themselves now.

== Checklist ==
Are there any related MPs required for this MP to build/function as expected? Please list.
Yes: https://code.launchpad.net/~boiko/history-service/keep_models_sorted/+merge/234024

Is your branch in sync with latest trunk (e.g. bzr pull lp:trunk -> no changes)
Yes

Did you perform an exploratory manual test run of your code change and any related functionality on device or emulator?
Yes

Did you successfully run all tests found in your component's Test Plan (https://wiki.ubuntu.com/Process/Merges/TestPlan/<package-name>) on device or emulator?
Yes

If you changed the UI, was the change specified/approved by design?
N/A

If you changed UI labels, did you update the pot file?
N/A

If you changed the packaging (debian), did you add a core-dev as a reviewer to this MP?
N/A

For more details, see:
https://code.launchpad.net/~boiko/messaging-app/remove_proxies/+merge/234025
-- 
https://code.launchpad.net/~boiko/messaging-app/remove_proxies/+merge/234025
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~boiko/messaging-app/remove_proxies into lp:messaging-app.