View specific comment in an issue quickly

Description

• Loading an issue page may be slow under various scenarios (gitlab-ce#23207).
• The scope of this issue is to implement a solution address gitlab-ce#23207 in the specific scenario of navigating/linking to a specific comment, such as https://gitlab.com/gitlab-org/gitlab-ce/issues/23207#note_18557250.
• Suggestions so far include loading that specific comment first, before others.