fix for files showing up on the bottom in new files

fixes: CNVS-15263

test plan:
load new files in a folder that has just a couple
children.

they should be on the top, not on the bottom of
the screen

Change-Id: If4b8da9295db8b1cda82f2d9bc32d1ff1f170579
Reviewed-on: https://gerrit.instructure.com/41073
Reviewed-by: Sterling Cobb <sterling@instructure.com>
QA-Review: Clare Strong <clare@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Ryan Shaw <ryan@instructure.com>
QA-Review: Ryan Shaw <ryan@instructure.com>