feed: ability to close reply form

This is an approach to close the reply-to-form automatically when
focus is lost and only if the input is empty. A second way to close
the reply-to-form is provided by toggling the reply icon.

@@ -430,0 +437,4 @@
+  const reply_to = localStorage.getItem('reply_to');
+  if (reply_to && writeInput.value === '') {
+    writeInput.addEventListener('transitionend', (event) => {
+      if (!reply_to || reply_to === localStorage.getItem('reply_to') && !writeInput.style.height) { // should prob use some class or data-attr instead of relying on height