Normalize additional identifiers

`structs` and `property` names do not appear to be normalized resulting in the following kind of representation:
```
public struct Fake
{
private int PLACEHOLDER_1;
public int PLACEHOLDER_2()
{
return PLACEHOLDER_1;
}

public int P
{
get => PLACEHOLDER_1;
}

public int P2
{
get => PLACEHOLDER_1;
set
{
PLACEHOLDER_1 = value;
}
}
Point PLACEHOLDER_4 = new Point(X = 0, Y = 0};
}

public class PLACEHOLDER_1
{
void PLACEHOLDER_2()
{
int LocalInt(int PLACEHOLDER_3) => PLACEHOLDER_3;
var PLACEHOLDER_4 = new Dictionary>{{LocalInt(5), PLACEHOLDER_5 => PLACEHOLDER_5}, };
}
}
```

`Fake`, `P`, `P2`, X, Y, LocalInt should all be normalized. This will break some tests.