"sleep" mapping does not work in Windows 10

[rbares]

libCECTray offers options for sleeping and waking other devices. Although the button mapping "sleep" is available, which should sleep the host PC from a remote, this does not work in Windows 10.

Steps to reproduce:

• Open libCECTray
• Select the "Foreground application" tab
• Click the "Up" CEC Button
• Click "Clear" in the "Button configuration" dialog
• Choose "sleep" from the "Add key" drop-down, click "+" and then "Close"
• Select the "Configuration" tab
• Click "Save configuration"
• Ensure Windows is configured with sleep enabled
• Press the "Up" button on the remote

Observed behaviour:

• Nothing happens

Expected behaviour:

• PC goes to sleep