iFrame Support for Content Hub Preview

Preview data generated by Content Hub Adapters can be marked as 'html' now. This way, it is possible to embed iframes into the Content Hub Preview, e.g. to embed YouTube videos.

(CMS-19492)

Filtering Issues Along with Categories in Studio Library

In the search view of the Studio library, you can now filter content issues not only by severity but also by a category, like localization issues. Note, that the issues filter is only visible, if the Content Feeder indexes issues in Solr. Section "Searching for Content | Content Issues" in the Search Manual describes how to enable issue indexing.

(CMS-18055)