add bookmark collection editor

data/static/js/bits/collections-editor.js

@@ -0,0 +1,18 @@
+export const b = {}
+
+export function addCollection(ev, sender, el) {
+  el.innerHTML += b.templates.collectionItem;
+}
+
+export function deleteCollection(ev, sender, el) {
+  if (!el.contains(sender)) return;
+  b.send({ 'id': el.prop('id') }, 'countDeletedCollection');
+  el.remove();
+}
+
+export function countDeletedCollection(payload, _, el) {
+  if (payload.id === 'new') {
+    return;
+  }
+  el.value += `${payload.id};`
+}