Overrides the `ToString` method on `Picker`.
Overrides the `ToString` method on `Picker`.

Previously this would return the name of the type, e.g. "nuPickers.Picker", now it would return the value of `SavedValue`.
This means that if we use `Model.Content.GetPropertyValue<string>("alias")` in our code, we would get the raw value, and not the `Picker` object itself.

LottePitcher/nuPickers,JimBobSquarePants/nuPickers,pgregorynz/nuPickers,abjerner/nuPickers,JimBobSquarePants/nuPickers,iahdevelop/nuPickers,abjerner/nuPickers,LottePitcher/nuPickers,pgregorynz/nuPickers,iahdevelop/nuPickers,uComponents/nuPickers,uComponents/nuPickers,uComponents/nuPickers,abjerner/nuPickers,iahdevelop/nuPickers,pgregorynz/nuPickers,pgregorynz/nuPickers,LottePitcher/nuPickers,JimBobSquarePants/nuPickers