Change ObsCollection to List in Common, write FunctionMaterialCreationVM, remove old UI, binding enums and functions to new UI.

StructureHelperCommon/Infrastructures/Interfaces/IOneVariableFunction.cs

@@ -28,7 +28,7 @@ namespace StructureHelperCommon.Infrastructures.Interfaces
         public double MaxArg { get; set; }
         public Color Color { get; set; }
         public string Trace { get; set; }
-        public ObservableCollection<IOneVariableFunction> Functions { get; set; }
+        public List<IOneVariableFunction> Functions { get; set; }
 
         public bool Check();
         public double GetByX(double xValue);