Review request comments made directly in the RS Writer persist for other requests

[heres-maria-sv-inactive]

[Prerequisites]:

• Have rights to Remote Settings Stage that allow you to make changes to some collections.
• Be connected to the corporate VPN.

[Steps to reproduce]:

1. Open the RS Writer page on the collection you want to modify (e.g. main-workspace/nimbus-mobile-experiments).
2. Modify one of the records and click “Update record”.
3. Click “Request review”.
4. Write a comment and click “Request review”.
5. Have someone use the Nimbus page to request an experiment launch review for the same collection.
6. Open the Simple Review page and observe the message displayed for the review request.

[Expected result]:

• Comments left for direct review requests from the RS Writer are not kept for all further review requests.

[Actual result]:

• Comments left for direct review requests from the RS Writer are kept for all further review requests (launch experiment and end enrollment).

[Notes]:

• Attached is a recording of the issue
  
  .

[leplatrem]

Thanks for reporting this!

This is weird, we do reset he last_editor_comment field when a review is requested:
https://github.com/Kinto/kinto-signer/blob/42080112bd8a96ce1c1d3e39cfef83851f643da3/kinto_signer/updater.py#L417-L419

Note: Experimenter could also set an explicit value for this field here https://github.com/mozilla/experimenter/blob/cf1e50aa07c08d34b6cd7183308d19641877ae13/app/experimenter/kinto/client.py#L32