Hi!
My appreciations for the latest Kodi 17 RC4 release!
I grabbed the source code from git, compiled it and checked all the latest efforts in bug-fixing and improving this wonderful piece of software.
Thank you for your amazing work! 
Is there any possibility to change the custom shutdown timer into custom EXIT timer if the user with which Kodi is started has no shutdown privileges? Until Kodi 17 03 beta it has worked, actually it was a bug that I’ve used as a feature. I don’t want to shutdown the computer I’m running Kodi on but only exit and let the Monitor/TV enter the sleep mode.
Furthermore, this timer is a de facto feature on every Multimedia device (including ancient TV Sets) and its location in the Exit Menu is rather uninspired – one needs to simulate an Exit to reach it. I’d suggest to put it together with a suggestive icon inside the contextual (the one immediately accessible while watching some content in Kodi) Options Menu.
My monologue on this:
http://forum.kodi.tv/showthread.php?tid=298867
I’ve also tried the service.sleeptimer and I wasn’t really impressed by it, not to mention that to reach its settings page is even harder than to simulate an exit.