Take out wide breakpoint on Submission details sidebar
Take out wide breakpoint on Submission details sidebar

refs: CNVS-27362

Test Plan:
- Go to an assignment that's been submitted > Submission Details
- Details sidebar on right should remain the same width from 992px and up
Screenshot - http://cl.ly/1o3R06433W1F

Change-Id: If002bc7f14da3e4b063a1dd88eda257e13befe15
Reviewed-on: https://gerrit.instructure.com/73995
Tested-by: Jenkins
Reviewed-by: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>
Product-Review: Pam Hiett <7b533437add1ce4ea4ed79979fa88e0e484e554b@instructure.com>
QA-Review: Nathan Rogowski <2e8aa918660411855c6d44d5bb2da677aa033255@instructure.com>

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