Show circle only when is any progress.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C41554
Add support for swipe gestures.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C41555
Fix up gesture.

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS15]$/Atomix;C41556