CSS in KB article body is not workingDescriptionThe CSS present in the KB article body is not honored when the article is published or previewed. While editing the KB with CSS content the CSS is visible in the article body but when the same is lost on Saving or Publishing the article.Steps to Reproduce Open Knowledge form view to create a KB articleClick on the source code button (<>) on the tinymce editor.Insert your content along with additional CSS attributes(<style></style> tags) on the top.Click on the related link 'View Article' Notice that the CSS added, does not reflect in the preview mode.Notice that the added CSS is missing when the source code is viewed. Expected behavior: CSS should be visible in preview mode and also when published.WorkaroundOpen the source code of the article and Insert a tag before the CSS at the top, until this is fixed. For example: <p> </p> or <p style= "display:None"></p>. Note: The workaround will prevent the CSS loss and ensure that the article styling is not broken on publishing/saving an article. However, it will not fix the existing broken articles since the CSS is already lost. The user has to create a new article version and add apply the workaround (Add <p style= "display:None"></p> at the top) before adding the required CSS to be able to make it work for the existing broken articles.Related Problem: PRB1614390