[BUG]Vanilla scene export does not use original geometry file name when preserving node info

[WinderTP]

Describe the bug
Expected behaviour: When exporting an otherwise vanilla scene with a modified file name, the "GEOMETRY" attribute retains the full path and original geometry file name

Current behaviour: "GEOMETRY" attribute retains file path, but the geometry file name becomes the scene's modified file name

To Reproduce

1. Change the name of the scene file
2. import into NMSDK
3. Export as MBIN
4. the file name in the "GEOMETRY" attribute should now be the same as the name of the scene file

Screenshots