Update suggestion component with custom render
The following discussion from gitlab-ce!25211 should be addressed:
- [ ] @pslaughter started a [discussion](https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/25211#note_153516148): (+1 comment)
> **thought:** I wonder if it'd be better to transform this `noteHTML` with a custom render function, rather than mounting it, and then manually mounting Vue components ontop of it. :thinking:... I can foresee us wanting to do this with things other than `suggestions` so maybe a general `decorated_markdown` component which houses this special render function... Definitely out of scope for this MR, but I'd like to know what you think @ntepluhina :smile:
/cc @ntepluhina
issue