So I’ve renamed the Triage section to Categories. Plus, (can’t be seen in this screenshot but) the read-only Duplicates field is now displayed even in the Edit mode, as requested by :adw in Bug 1539277.
Bug 1344091 Comment 26 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
So I’ve renamed the Triage section to Categories (thanks :glob for the input!) Plus, (can’t be seen in this screenshot but) the read-only Duplicates field is now displayed even in the Edit mode, as requested by :adw in Bug 1539277.