fix: Remove style tags from email content (#2515)

app/javascript/dashboard/components/widgets/conversation/helpers/EmailContentParser.js

@@ -0,0 +1,12 @@
+export const stripStyleCharacters = emailContent => {
+  let contentToBeParsed = emailContent.replace(/<style(.|\s)*?<\/style>/g, '');
+  contentToBeParsed = contentToBeParsed.replace(/style="(.*?)"/g, '');
+  let parsedContent = new DOMParser().parseFromString(
+    contentToBeParsed,
+    'text/html'
+  );
+  if (!parsedContent.getElementsByTagName('parsererror').length) {
+    return parsedContent.body.innerHTML;
+  }
+  return '';
+};