MC-3959: Button Doesn't Render HTML On Storefront

- fix tag-escaper to escape and unescape once

Author: krissyhiserote

app/code/Magento/PageBuilder/view/adminhtml/web/js/converter/html/tag-escaper.js

@@ -15,7 +15,7 @@ export default class TagEscaper implements ConverterInterface {
      * @returns {string | object}
      */
     public fromDom(value: string): string | object {
-        return unescape(unescape(value));
+        return unescape(value);
     }
 
     /**
@@ -26,6 +26,6 @@ export default class TagEscaper implements ConverterInterface {
      * @returns {string}
      */
     public toDom(name: string, data: DataObject): string {
-        return escape(escape(data[name].toString()));
+        return escape(data[name].toString());
     }
 }