add bookmark collection editor

data/static/js/bits/progressive-enhancement.js

@@ -1,5 +1,5 @@
 export const b = {
-  init: 'enhance',
+  init: 'enhance enhanceHide',
 }
 
 export function enhance(_, __, el) {
@@ -18,3 +18,11 @@ export function enhance(_, __, el) {
     }
   }
 }
+
+export function enhanceHide(_, __, el) {
+  if (el === undefined) {
+    return;
+  }
+
+  el.style.display = 'none';
+}