add in overlay scroll bar that responds to mouse
requested to merge mateosalta/lxc-android-config:mateosalta-ubports/xenial-patch-90135 into ubports/xenial
blink settings have a flag for very nice overlay scrollbars, submitted here because this is where the chromium flags are set right now.
- shows in dark pages
- can be dragged by touch/mouse
- fades out after usage