Feature request: Better hint styling

[eproxus]

I'd like to see the following enhancements to link hint CSS styling:

• The ability to control position with CSS. E.g.:

  position: absolute;
  display: block;
  top: 20px;
  left: 20px;
  

• Classes for non-focused hints
• Classes for focused letters within focused hints

(Similar to how Vimium does it)