Fix too large copyArea() when scrolling in scrollRegion
clearArea() keeps colors
Defensive check
ICH keeps colors
Reset display scrolling when reseting
Remove TODO : done
Merge pull request #64 from Plonk42/scoll_enact_bug

Fix scroll display bug
Merge pull request #65 from Plonk42/reset_scroll

Reset display scrolling when reseting
Merge pull request #66 from Plonk42/color_clear_area

Keep colors in clearArea() and ICH