Just found something that I never knew.... In a sketch, when you select a face and convert edges, it only converts outer edges of the surface. If there are inner window/boss features from this face, these edges don't get converted. For some time now you have had the ability to right click an edge (of the window/boss) and click "select loop" in order to convert these edges. But when you do this method you always have to make sure that the arrow is pointing to the correct loop. Another method that my co-worker just figured out is a little quicker and easier with less mouse clicks. Simply select the face and one edge of the inner window/boss and convert. It will only convert the inner loop this way and you don't have to deal with the arrow.