Google's Leanback Launcher has been updated to Android TV Launcher 1.1.5.2619280 on 4th April. This does not appear to automatically update the Sony version 1.1.4 etc.
I've just successfully sideloaded the new version. https://www.apkmirror.com/apk/google-inc/leanback-launcher/leanback-launcher-1-1-5-2619280-release/a...
Bug fixes are claimed. Plus some non Sony TV users of Android TV report other changes:- http://androidtv.news/2016/04/leanback-launcher-removes-custom-apps-row/
