Query past items when pulling down on touch screen
Query past items when pulling down on touch screen

fixes ADMIN-267

Test plan:
  - on a touch screen device, load the planner with some future and past
    events
  - drag your finger down the screen (but not so much as to cause an
    android device to refresh the page)
  > expect past items to be loaded

Change-Id: Ic6e4d8dac7cc3115b7acbffb70dbb2674e4c14cc
Reviewed-on: https://gerrit.instructure.com/131484
Tested-by: Jenkins
Reviewed-by: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>
Product-Review: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>
QA-Review: Dan Minkevitch <2591e5f46f28d303f9dc027d475a5c60d8dea17a@instructure.com>

instructure/canvas-planner,instructure/canvas-planner,instructure/canvas-planner