Prettify all the things (part 1)

What does this MR do?

Prettifies every module within:

• app/assets/javascripts/blob
• app/assets/javascripts/behaviors
• app/assets/javascripts/cycle_analytics
• app/assets/javascripts/environments
• app/assets/javascripts/feature_highlight
• app/assets/javascripts/filtered_search
• app/assets/javascripts/diff_notes
• app/assets/javascripts/diffs
• app/assets/javascripts/droplab

What are the relevant issue numbers?

gitlab-org/gitlab-ce#52764

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides