use proper delete button

src/wanijo/schema/view.clj

@@ -88,7 +88,7 @@
         (hform/form-to [:delete (path :attribute-delete attr)]
                        (anti-forgery-field)
                        (hform/hidden-field "schema" (:uuid schema))
-                       (hform/submit-button {:class "delete-btn"} "Delete!")
+                       (view/delete-btn)
                        [:label "Created at "
                         [:em (prettify-dt (:created_at attr))]])])]
     [:h3 "New attribute"]