Copy a comment link quickly

Description

When I want to link a comment from the issue, I have to do those steps:

1. Using inspect tool to check the id of the comment (e.g. #note_43218083).
2. Copy the link of the issue (e.g. https://gitlab.com/gitlab-org/gitlab-ce/issues/38832`) and paste it in the comment box.
3. Copy the id of the comment I want to link. Then, paste it after the link of the issue in the comment box. It'll be https://gitlab.com/gitlab-org/gitlab-ce/issues/38832#note_43218083.

I think there can be a simpler way to let people link the comment directly.

Proposal

• Add a Copy link in the More actions dropdown list.
• If the user clicks Copy link, we'll automatically generate the complete link (e.g https://gitlab.com/gitlab-org/gitlab-ce/issues/38832#note_43218083)

so the user doesn't need to check the id and combine it with the issue link by herself anymore.

Links / references

Documentation blurb

Overview

What is it? Why should someone use this feature? What is the underlying (business) problem? How do you use this feature?

Use cases

Who is this for? Provide one or more use cases.

Feature checklist

Make sure these are completed before closing the issue, with a link to the relevant commit.

• Feature assurance
• Documentation
• Added to features.yml