Fix display of margins on GTK+. Were appearing red when scrolling as they were copying from the start of the pixmap instead of where the drawing occurred. Caused by optimized drawing in changeset 3949. Also ensured whitespace fold tails displayed correctly.
Fix display of margins on GTK+. Were appearing red when scrolling
as they were copying from the start of the pixmap instead of where
the drawing occurred. Caused by optimized drawing in changeset 3949.
Also ensured whitespace fold tails displayed correctly.

rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror,rhaberkorn/scintilla-mirror