Enable sharing of comments via a deep-link #494

Context

At CERN, we have communities that were creating persistent URLs to comments. In that paradigm, a comment is more of a peer review, which after submission, is immutable to changes.

The feature aims to add a way to "copy the link" to a comment, similar to GitHub, so that this can be shared with others or referenced in comments.

Tasks

• Frontend design of sharing a comment.
• Frontend design of jumping to a comment from a link.
• Implementation