Increase accuracy of Windows Sleep function

Windows 10 version 1803 (build 17134) and later versions support
high-resolution waitable timer, which offers much better accuracy over
Sleep function without the need of increasing the global timer
resolution. For older versions of Windows, we reduce the timer
resolution to 1ms and use normal waitable timer for sleeping.

Source/Engine/Platform/Windows/WindowsPlatform.cpp

@@ -18,6 +18,7 @@
 #include "../Win32/IncludeWindowsHeaders.h"
 #include <VersionHelpers.h>
 #include <ShellAPI.h>
+#include <timeapi.h>
 #include <Psapi.h>
 #include <objbase.h>
 #if CRASH_LOG_ENABLE
@@ -579,6 +580,12 @@ bool WindowsPlatform::Init()
         return true;
     }
 
+    // Set lowest possible timer resolution for previous Windows versions
+    if (VersionMajor < 10 || (VersionMajor == 10 && VersionBuild < 17134))
+    {
+        timeBeginPeriod(1);
+    }
+
     DWORD tmp;
     Char buffer[256];