Qt3DExtras::QExtrudedTextMesh loses its properties when saved by Qt GLTF

When a Qt3D entity with a mesh of `Qt3DExtras::QExtrudedTextMesh` is saved by GLTF, its properties are lost: depth, font and text. Looks like GLTF is saving `Qt3DExtras::QExtrudedTextMesh` like a generic mesh with vertex and index buffers.

To elaborate more, I have attached a screenshot of how GLTF saves `Qt3DExtras::QExtrudedTextMesh` on disk and I compared it with how `Qt3DExtras::QCuboidMesh` is saved.