Edit blocklists and rules in the web UI

An Edit button opens a dialog for a list's name, URL, views and comment,
or a rule's action, scope, views and comment. The download-now button is
called Refresh. Checkboxes in dialogs are no longer stretched.

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

CHANGELOG.md

@@ -46,6 +46,9 @@ All notable changes to Jarl are documented here. The format follows
   indents and Enter keeps the indentation (Esc, then Tab, moves on). With
   a draft open, the tables show the draft's values, so a staged edit stays
   visible after Save.
+- Blocking page: blocklists and rules have an Edit button (name, URL,
+  views, comment; a rule's action and scope). The list button that
+  downloads now is called Refresh, like `jarl blocklist refresh`.
 - Records table: disabled records are hatched and have a "disabled" badge
   next to their name, instead of only a muted colour and a badge in the
   comment column.