Copy across 'double nested' included files when moving a model

**Is your feature request related to a problem? Please describe.**
Currently if a file is included inside a file that is skipped over, e.g. a property file, that file will not be copied across when moving a model.

**Describe the solution you'd like**
All files that are included in the model should be copied when moving a model.

**Describe alternatives you've considered**
N/A

**Additional context**
It is possible that files included that are nested more than two layers down are also not copied, this should also be tested, ideally with a unit test.