dock-applets: set setting window listview boundsBehavior to `Flickable.StopAtBounds`

tower: https://tower.im/projects/8f19f0bf0e754f0b82ef2c24bc230973/todos/4b7a45e247b645b69ef27c2e4bae75e6/

Change-Id: Iee3e2b51612ce0cd7b83f31dc95ea5b27400075d