Add back icon name in class attribute to work again with font icons#9666

nul800sebastiaan merged 1 commit intoumbraco:v8/contribumbraco/Umbraco-CMS:v8/contribfrom

bjarnef:v8/bug/umb-node-preview-iconbjarnef/Umbraco-CMS:v8/bug/umb-node-preview-iconCopy head branch name to clipboard