v2.1/feature:dspinner keyboard input

tower: https://tower.im/projects/d4e0ff64158645f28d99a9ca72d0c27b/todos/54a1f050ba03445da43bf852c5352ccf/

Change-Id: Ib5c5f96877c605d969d51b0dd864c1101e78ac9a
Merge "v2.1/feature:dspinner keyboard input"