Spark Window does not expose renderMode or access to NativeWindowInitOptions when the NativeWindow is created

Repro steps:

1. Build & run attached project (in debugger_
2. Click on button

Expected:

App should trace out the driverInfo for the Context3D that indicates hardware acceleration - "OpenGL (Direct blitting)" for example

Result:

App throws an exception.

Workaround:

monkey-patch the Window class