Web UI: option values keep the editor's layout

A shown option value wrapped long lines back to the left edge, losing
their indentation, and had different padding and width from the editor,
so the text and column moved when Edit opened. Values now don't wrap (a
long line scrolls), with the editor's padding and the same width. The
"{ } around the list are optional" hint only shows for options that end
in a list, not rate-limit, which only has one inside.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -20,6 +20,12 @@ All notable changes to Jarl are documented here. The format follows
 
 ### Fixed
 
+- Option values in the web UI looked different from the editor: a long
+  line wrapped back to the left edge, losing its indentation, and the
+  column changed width when Edit opened. Values now keep their layout
+  (a long line scrolls), with the same width and padding as the editor.
+  The "{ } around the list are optional" hint only shows for options that
+  end in a list (not rate-limit, which only has one inside).
 - Query statistics skipped every query signed with a TSIG key (named
   writes "/key NAME" after the client's port), such as queries with a
   view's key: they are counted now.