Roslyn: Refactoring "Move type to ..." removes modifier

[JosefPihrt]

Version Used: Visual Studio 2017 RC 15.0.26014.0

Code to Reproduce:

public abstract class Foo
{
    private class Bar // Move type to Bar.cs
    {
    }
}

Actual Behavior:

public partial class Foo
{
}

[Pilchie]

@CyrusNajmabadi didn't you fix this?

[CyrusNajmabadi]

I'll check. I fixed at least one case of this. But there may be others.

[miloush]

I actually prefer to keep all modifiers at one place so that I do not have to go through each file when refactoring, so my expected would be partial class Foo here.

[CyrusNajmabadi]

This has been fixed. THe original file will look like this:

```c#
public abstract partial class Foo
{
}

And the new file will look like this:

```c#
public abstract partial class Foo
{
    private class Bar // Move type to Bar.cs
    {
    }
}