Drawer launch from gesture controls

Change-Id: Ibb3eb72c83645549b7631eeedead5700d65b0cf6
Return to workspace on unhandled tap if configured

Change-Id: I489d509bb9f73937a8b77a4815052ebdc1ebc5a7
Whoops, should be showWorkspace

Change-Id: Ib4885afba1be147d79092f805e9cc39d98f3e7e1
Revert "Improve scroll responsiveness."

This reverts commit 916bc3880c3800761722a4286eb77b12a766a709.