0027811: Configuration - allow building TKOpenGl with OpenGL ES on Windows

0027811: Configuration - allow building TKOpenGl with OpenGL ES on Windows

OpenGl_ShaderManager::prepareStdProgramFboBlit() now tries using extension
GL_EXT_frag_depth within OpenGL ES 2.0 when OpenGL ES 3.0 is not available.
OpenGl_View::blitBuffers() now disables Depth test
when copying depth values is not supported by OpenGL ES 2.0 hardware.

Fixed building for UWP with SDK 10.0.10240.0
Fixed building TKService, TKV3d and TKOpenGl for UWP.

OSD_Environment now defines global environment map
for emulating desktop behavior on UWP.