OverlaySheet (Drawer for mobile) to control playback rate.
Closes #12 (closed) Added slowing of playback rate and using OverlaySheet(desktop) and OverlayDrawer(mobile).
Edited by Swapnil Tripathi
Closes #12 (closed) Added slowing of playback rate and using OverlaySheet(desktop) and OverlayDrawer(mobile).