Allow invariant type/part definition lookup in ContentDefinitionManager

[MikeAlhayek]

Fix #12101

[ns8482e]

Not sure if this request might add breaking changes on instantiating type systems are case sensitive - in C# event and Event can be represented differently and technical names are tied to C# types

[MikeAlhayek]

Not sure if this request might add breaking changes on instantiating type systems are case sensitive - in C# event and Event can be represented differently and technical names are tied to C# types

The line prevent the user from creating the name using UI. The good news is that this isn’t going to be a breaking change. It’s more of making all the rules the same :)