appview: two small cleanups

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

appview/pages/templates/repo/blob.html

···
       </div>
     {{ end }}
     {{ template "fragments/multiline-select" }}
-    {{ template "fragments/line-quote-button" }}
     <script>
       (() => {
         const abortController = new AbortController();

appview/repo/archive.go

···
 		rp.pages.Error503(w)
 		return
 	}
+	defer resp.Body.Close()
 
 	// pass through headers from upstream response
 	if contentDisposition := resp.Header.Get("Content-Disposition"); contentDisposition != "" {