Kodi 17.2

Fix selection after channelgroup switching in PVR guide window.
Fix handling of gaps that caused eradic behaviour in EPG grid.
Allow backing out of fullscreen pictures by mapping longpress guesture.
Quick fix for wake up command not being called in PVR power management.
Use alternative method to check if platform updates have been installed on Windows.
Set the minimum version in the code which is currently OSX 10.8.
Fix possible security flaw which could abused .zip files which try to traverse to a parent directory.
Use the correct ttc font from the video file for subtitles on Windows.
Detect and delete zero-byte database files which causes crashes.