appview/pages/templates/repo/pulls: fix non-current round card bg color regression & add back missing hunk

Signed-off-by: eti <[e-mail]>

appview/pages/templates/repo/pulls/pull.html

···
 
 {{ define "contentAfter" }}
   <input type="hidden" id="round-link-base" value="/{{ .RepoInfo.FullName }}/pulls/{{ .Pull.PullId }}/round/{{ .ActiveRound }}" />
+  {{ if .IsInterdiff }}
+    <input type="hidden" id="is-interdiff" value="1" />
+  {{ end }}
   {{ template "repo/fragments/diff" (list .Diff .DiffOpts $) }}
 {{ end }}
 
···
     {{ if eq $round $root.ActiveRound }}
       bg-blue-50 dark:bg-blue-950
     {{ else }}
-      bg-gray-50 dark:bg-gray-900
+      bg-white dark:bg-gray-800
     {{ end }}
 
     flex gap-2 sticky top-0 z-20">