Latest version of Wunderlist is not built using TideSDK. They have re-implemented all different versions pure natively on each platform they are supporting.
TideSDK currently does not support Code hiding however the Developers of TideSDK are developing TideKit which is releasing soon with a new CLI, app and will provide platform builds. It will also provide Code Hiding. You can follow recent developments at http://www.tidekit.com. The video of what is coming is here: http://youtu.be/aE7gN-d0GhU. This will give you modern tools to use where the experience of creating and your projects is much better.