fix the popout link padding on google docs submission file list
fix the popout link padding on google docs submission file list

With the new bootstrap commit this padding causes each link to be offset
from the last

refs CNVS-4295

test plan: load your student list of google docs for submitting an
assignment. the popout links on the right side of the list should all
line up.

Change-Id: I503f413a7ace7b0281d1e232c584ba94b541b4c5
Reviewed-on: https://gerrit.instructure.com/18288
QA-Review: Clare Hetherington <40d6bb3ed7fef516c73274131d5a837c16de74fd@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>

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