make quote button allow preview without needing to edit

data/static/js/bitties/pyrom-bitty.js

@@ -141,7 +141,7 @@ export default class {
     }
   }
 
-  #previousMarkup = '';
+  #previousMarkup = null;
   async babycodePreview(ev, el) {
     if (ev.sender.classList.contains('active')) {
       return;
@@ -151,11 +151,17 @@ export default class {
     const previewContainer = el.querySelector('#babycode-preview-container');
     const ta = document.getElementById('babycode-content');
     const markup = ta.value.trim();
-    if (markup === '' || markup === this.#previousMarkup) {
+    if (markup === '') {
       previewErrorsContainer.textContent = 'Type something!';
       previewContainer.textContent = '';
+      this.#previousMarkup = '';
       return;
     }
+
+    if (markup === this.#previousMarkup) {
+      return;
+    }
+
     const bannedTags = JSON.parse(document.getElementById('babycode-banned-tags').value);
     this.#previousMarkup = markup;