GUI: serialization refactoring part 3

Mikhail Svechnikovrequested to merge
serialization_3.1 into main

The following classes now have implemented readFrom and writeTo methods:

DoubleProperty, VectorProperty, Lattice2DItems, MaterialItem, MaterialModel, ProfileItems, RotationItems, RoughnessItems, SampleItem

The serialization method for these classes is left temporary for the compatibility; it refers to readFrom and writeTo.

Edited by Mikhail Svechnikov

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