Organize Imports drops import for same-unit inner class

Consider the following:
```groovy
import B.C
class A {
  C c // any reference to C will do
}
class B {
  C c
  static class C {
  }
}
```

Organize Imports (Ctrl+Shift+O) removes the import statement and this in turn causes the reference to `C` within `B` to be unresolved.