DeviceManager: Allow user to configure desktop device
Show desktop device in the Devices options page. Allow
user to configure the port range for the desktop. These
ports can then be used by others such as QML Debugger.
Change-Id: I8c4a96207e54f58d1e9bc18c417cb378dc9f70c2
Reviewed-by:
Christian Kandeler <christian.kandeler@digia.com>