fix: rich text editor fix

Author: vip-git

src/demo/examples/simple/form-data.json

@@ -2,6 +2,7 @@
   "firstName": "Chuck",
   "lastName": "Norris",
   "age": 75,
+  "bio": "<p><u>ads</u></p>",
   "password": "noneed",
   "creatableSelectTest": "[{\"label\":\"hello\",\"value\":\"hello\"},{\"label\":\"yes\",\"value\":\"yes\"}]",
   "selectTest": "[{\"key\":\"220\",\"value\":\"Vanaf 6 jaar\",\"allowableOptionValues\":{\"210\":\"Alle Leeftijden\",\"220\":\"Vanaf 6 jaar\",\"225\":\"Vanaf 9 jaar\",\"230\":\"Vanaf 12 jaar\",\"240\":\"Vanaf 16 jaar\",\"250\":\"Vanaf 18 jaar\"}},{\"key\":\"210\",\"value\":\"Alle Leeftijden\",\"allowableOptionValues\":{\"210\":\"Alle Leeftijden\",\"220\":\"Vanaf 6 jaar\",\"225\":\"Vanaf 9 jaar\",\"230\":\"Vanaf 12 jaar\",\"240\":\"Vanaf 16 jaar\",\"250\":\"Vanaf 18 jaar\"}},{\"key\":\"225\",\"value\":\"Vanaf 9 jaar\",\"allowableOptionValues\":{\"210\":\"Alle Leeftijden\",\"220\":\"Vanaf 6 jaar\",\"225\":\"Vanaf 9 jaar\",\"230\":\"Vanaf 12 jaar\",\"240\":\"Vanaf 16 jaar\",\"250\":\"Vanaf 18 jaar\"}}]"

src/fields/components/lib/RichText.jsx

@@ -40,7 +40,7 @@ const BLOCK_TAGS = {
 const MARK_TAGS = {
   strong: 'bold',
   em: 'italic',
-  u: 'underline',
+  u: 'underlined',
   s: 'strikethrough',
   code: 'code',
 };
@@ -337,6 +337,7 @@ class RichText extends React.Component {
 
     if (['numbered-list', 'bulleted-list'].includes(type)) {
       const { value } = this.state;
+      if (!value.blocks.size) return true;
       const parent = value.document.getParent(value.blocks.first().key);
       isActive = this.hasBlock('list-item') && parent && parent.type === type;
     }