Dictionaries can't be internalised or deserialised

[pawelbaran]

Description:

Not sure where exactly does the issue lie, so raising it under UI.

In Grasshopper, properties of type Dictionary<TKey, TValue> get set to null at any attempt to internalise the property value or save/load file. This is particularly annoying when one creates a new object of type that has such property defaulted to an empty dictionary, which magically gets set to null after reopening the file, leading to unexpected errors.

Steps to reproduce:

1. Open GH
2. Create FilterRequest using the default constructor (not Create method)
3. Try to copy the component - Equalities will be set to null in the copied component
4. Try saving and reopening the file - Equalities will be set to null in the original component