Applications 18.12 is out. Now you can annotate PDFs with a "typewriter" tool in Okular, see previews of ODF documents in Dolphin, and show emojis in Konsole. Apps 18.12 with many more features and improvements will be landing in your distro soon.
https://www.kde.org/announcements/announce-applications-18.12.0.php?site_locale=en