Persist order of draft comments added
## Context The following discussion from !51718 should be addressed: - [ ] @pslaughter started a [discussion](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/51718#note_514878783): (+1 comment) > **issue (ux,non-blocking):** Just noticed that the order of draft notes isn't persisted? > > | Initial | Then, Change Sort | Then, Refresh page | Then, Change Sort | > |---------|--------------|--------------|--------------| > | ![Screen_Shot_2021-02-23_at_1.16.17_AM](/uploads/6cf8fadce8e6c61240b14601b4893454/Screen_Shot_2021-02-23_at_1.16.17_AM.png) | ![Screen_Shot_2021-02-23_at_1.16.28_AM](/uploads/700bd468924d366a2d67f3e70f94ba30/Screen_Shot_2021-02-23_at_1.16.28_AM.png) | ![Screen_Shot_2021-02-23_at_1.17.29_AM](/uploads/8c3b909b3109aacb4bc138b84854c173/Screen_Shot_2021-02-23_at_1.17.29_AM.png) | ![Screen_Shot_2021-02-23_at_1.17.20_AM](/uploads/75b8d942aa13f0c0fb94ef9df28665f7/Screen_Shot_2021-02-23_at_1.17.20_AM.png) | > > This probably isn't a blocker. We should probably create a follow-up issue for it. > > FWIW, the data-driven suggestion + exposing `created_at` in the BE would probably immediately fix this. > > /cc @pedroms /cc @leetickett @pedroms
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