Migrating default values

Added default value migration for the following nodes:
- JoinStrings
- RemoveEveryNth, TakeEveryNth
- Color
- Xyz, XyzToPolar
- WriteDataToExcelWorksheet
- SolidSphere, SolidTorus, SolidBoxByTwoCorners, SolidBoxByCenterAndDimensions, SolidCylinder, LoftForm, CreateSweptGeometry, CreateSweptBlendGeometry

Added default values on the following node implementations:
- Color
- WriteDataToExcelWorksheet
- SolidSphere, SolidTorus, SolidBoxByCenterAndDimensions, SolidCylinder, LoftForm