Create definition doesn't work on functions with the same name but different parent class

Repro is with 

```cpp
class MyClassA
{
public:
	void SameFunctionName() {}
};

class MyClassB
{
public:
	void SameFunctionName(); // The Create Definition code action should be available here, works in 1.24.5 (regression starting with 1.25.3).
};
```

This was reported and fixed in the VS shared implementation.
