Fixed DFL-2583 Line highlighting in scripts doesn't scale with the panel.
Fixed DFL-2583 Line highlighting in scripts doesn't scale with the panel.

That also fixed the varying horizontal scrollbar width on scrolling scripts that
had lines longer than what could fit in the view.
Also horizontal scrollbar is no longer shown if all lines of the script fit
within the view.
And changed name of horizontal_scoller as I couldn't find "scoller" in the
English dictionary. Norwegian has "skol" but this wasn't the intented
meaning I believe.

operasoftware/dragonfly,operasoftware/dragonfly,operasoftware/dragonfly,operasoftware/dragonfly