Refactor inlineStyles (#1601)

This is a big one

- got rid from another closestByName usage
- delegated removing empty defs elements to removeEmptyContainers plugin
- got rid from all css-tools usages (most inlineStyles code was there
  for some reason)
- combined a few loops
- fixed useMqs option (I would remove it in v3 for simplicity as it
  seems nobody use it)

Author: TrySound