Update generateSettings to handle data mappings at any position in settings

[jwildfire]

Right now generateSettings() only handles data mappings at level 1 or 2 of the settings next - throws this error otherwise. We should write a new (probably recursive) method to make this work at any level of the settings object. It will be a bit like the code for getSettingValues().

[jwildfire]

Probably best to write a separate setSetting() method that takes a settings object, a list of keys and a value, and returns updated settings