Update html for index resource

src/views/surveys.lisp

@@ -12,15 +12,15 @@
 (defun surveys (surveys)
   "Generates the view to show all surveys available."
   (with-page (:title "Surveys")
-    (navbar-en)
-    (:section :class "container"
-              (:h2 :class "mb-3"
-                   "Your Surveys")
+    (body-header "Surveys" (navbar-en))
+    (:main :id "main-content"
+           :class "container"
            (:div :class "btn-toolbar my-3"
                  (:div :class "btn-group me-2"
                        (:a :class "btn btn-primary"
                            :href "/new-survey"
                            "New Survey")))
+           (:h2 :class "mb-3" "Overview")
            (:ol :class "list-group list-group-numbered"
                 (loop for survey in surveys
                       for title = (extract-title survey)