Comment 1 for bug 1035324

@ugo
check with zsombi on this. The plan was as follows:
[apps team] apps need to add scrollbar component to views, will turn on automatically if pointer is detected
[ubuntu-ui-toolkit] need to detect if a mouse/input device is detected (input device detection) and activate the thumb on scrollbars: https://bugs.launchpad.net/ubuntu-ui-toolkit/+bug/1276802