[Proposal] Apply infer option to field member or apply it as new option.

I'm not sure anyone suggest this topic but I think infer field member should be apply, any reason it apply to local variant should be use with initialized field member.

Befor.
```vb
Public Shared DInvoke As Func(Of Int32, Int32, Int32, Int32, Int32, Int32, Int32) = Friendly.DInvoke

Friend Shared Copy_block_byte As Action(Of UIntPtr, UIntPtr, uint) = "la.1.0.2 cpyb".compile(Of Action(Of UIntPtr, UIntPtr, uint)).fin
```

After
```vb
Public Shared DInvoke = Friendly.DInvoke

Friend Shared Copy_block_byte = "la.1.0.2 cpyb".compile(Of Action(Of UIntPtr, UIntPtr, uint)).fin
```