Opera and editorarea scrollbar

Need help with editor. How to show scrollbar in editor area permanently in Opera?
I insert style

body {
  overflow-y: scroll;
}

into config, but after that Opera shows x and y scrollbars in font-size select... :shock:

body:first-of-type {
  overflow-y: scroll;
}

gives the same effect.

body:first-of-type {
  overflow-y: scroll;
}
body:first-of-type * {
  overflow-y: hidden;
}

is similar to previous... :cry:

please help :roll: