Reordering granularity

[Shatur]

I like when reordering feature is applied to variables inside the file.

But I'd prefer to avoid reordering the functions.

• Sometimes I have a public function and a related private helper. It reads better when this private function located right after use. When code reordering is enabled, it might end up after a bunch of public functions.
• Sometimes I have static private helpers and they come first in the file. I read code top to bottom, so I'd prefer them to be located after when they used by public or virtual functions.

I know it contradicts the official style guide, but it would be nice to have a CLI option that enables only variables reordering.