[feature proposal] Add notation format for linking to comments in issues and merge requests

After reading Tutorial: It's all connected in GitLab, I got feeling that not everything is connected. There is no simple way for me to create a link to comment at specific issue. Current workflow is:

1. Open issue and locate comment.
2. Click on issue timestamp then right click and copy url.
3. Go to new url and type something like #2554 ([comment](https://gitlab.org/blah/blah/issues/34343#notes_34324)).

Then, if I move my instance of GitLab to another domain, or will make any other changes, these links needs to be updated and so on...

Why don't create format, where I could link comment easier?

I suggest following format #XXX_ZZZZZZ, where XXX - issue or merge request number and ZZZZZZ comment id. Gitlab should parse this in convert into #XXX (comment ZZZZZZ).

Each comment should have a button, which will allow with a single click copy properly formatted link to the comment, so it can be pasted anywhere in existing Gitlab instance.