reintroduce bitty and add progressive enhancement and tabs

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

@@ -0,0 +1,17 @@
+export const b = {
+  init: 'enhance',
+}
+
+export function enhance(_, __, el) {
+  console.log(el);
+  if (el.classList.contains('js-only')) {
+    el.classList.remove('js-only');
+  }
+
+  if (el.disabled) {
+    el.disabled = false;
+    if (el.title.search('JavaScript') !== -1) {
+      el.title = '';
+    }
+  }
+}