am e47f55c3: Improve desktop scrolling from the previews switcher.

Merge commit 'e47f55c30b9c24f01f2be861247c92f17fbe4a61' into eclair-mr2

* commit 'e47f55c30b9c24f01f2be861247c92f17fbe4a61':
  Improve desktop scrolling from the previews switcher.