Allow IE 11 to also see oauth screens
Allow IE 11 to also see oauth screens

fixes:  COREFE-251

We made a change to not redirect IE 11 users away from the login screen
But they also need to be able to get to the /login/oauth2/confirm action
that is from the `oauth2_provider` controller so this will let them see
that too.

Change-Id: I3a19211cc219150fc40db8d19e4a1563226b220f
Reviewed-on: https://gerrit.instructure.com/208371
Tested-by: Jenkins
QA-Review: Tucker Mcknight <4b51b98c1d84aa97854d216bd061ce5d3eda8a28@instructure.com>
Product-Review: Ryan Shaw <ea3cd978650417470535f3a4725b6b5042a6ab59@instructure.com>
Reviewed-by: Jacob Burroughs <8ecea6e385af5cf9f53123f5ca17fb5fd6a6d4b2@instructure.com>

instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,djbender/canvas-lms