Fix popup issues in safari
Fix popup issues in safari

opener isnt set on modals, just removed showModalDialog since there wasn't
a huge need for it.

Fixes PLAT-941

Make sure you can auth on the submissions page from firefox, chrome, IE, and safari

Change-Id: I3b32319347b80951122f5625749eb6de21921172
Reviewed-on: https://gerrit.instructure.com/50187
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Reviewed-by: Nathan Mills <10b0771d20c18ad0d98c1d000665e443052b40b0@instructure.com>
Tested-by: Jenkins
Product-Review: Brad Horrocks <7b5c5d1f2eba6c540b8e53f17d87a9bd7dbf604b@instructure.com>

utkarshx/canvas-lms,redconfetti/canvas-lms,juoni/canvas-lms,Rvor/canvas-lms,SwinburneOnline/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,whalejasmine/canvas-lms,utkarshx/canvas-lms,skmezanul/canvas-lms,venturehive/canvas-lms,jay3126/canvas-lms,greyhwndz/canvas-lms,Jyaasa/canvas-lms,kyroskoh/canvas-lms,Jyaasa/canvas-lms,samuels410/greatlakes-lms,roxolan/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,juoni/canvas-lms,efrj/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,fronteerio/canvas-lms,sfu/canvas-lms,jay3126/canvas-lms,kyroskoh/canvas-lms,fronteerio/canvas-lms,roxolan/canvas-lms,whalejasmine/canvas-lms,va7map/canvas-lms,utkarshx/canvas-lms,SwinburneOnline/canvas-lms,HotChalk/canvas-lms,ShreniiNepal/shrenii_lmp,whalejasmine/canvas-lms,Rvor/canvas-lms,grahamb/canvas-lms,kyroskoh/canvas-lms,wrdsb/canvas-lms,juoni/canvas-lms,fronteerio/canvas-lms,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,ShreniiNepal/shrenii_lmp,wrdsb/canvas-lms,juoni/canvas-lms,va7map/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,leftplusrightllc/canvas-lms,tgroshon/canvas-lms,samuels410/greatlakes-lms,shidao-fm/canvas-lms,wrdsb/canvas-lms,wrdsb/canvas-lms,leftplusrightllc/canvas-lms,Jyaasa/canvas-lms,tgroshon/canvas-lms,redconfetti/canvas-lms,sdeleon28/canvas-lms,antoniuslin/canvas-lms,sfu/canvas-lms,sdeleon28/canvas-lms,kyroskoh/canvas-lms,djbender/canvas-lms,efrj/canvas-lms,Jyaasa/canvas-lms,ShreniiNepal/shrenii_lmp,Rvor/canvas-lms,jay3126/canvas-lms,antoniuslin/canvas-lms,efrj/canvas-lms,shidao-fm/canvas-lms,djbender/canvas-lms,HotChalk/canvas-lms,leftplusrightllc/canvas-lms,leftplusrightllc/canvas-lms,va7map/canvas-lms,djbender/canvas-lms,samuels410/greatlakes-lms,tgroshon/canvas-lms,skmezanul/canvas-lms,efrj/canvas-lms,sfu/canvas-lms,utkarshx/canvas-lms,Rvor/canvas-lms,greyhwndz/canvas-lms,roxolan/canvas-lms,sfu/canvas-lms,grahamb/canvas-lms,ShreniiNepal/shrenii_lmp,va7map/canvas-lms,shidao-fm/canvas-lms,sdeleon28/canvas-lms,tgroshon/canvas-lms,SwinburneOnline/canvas-lms,greyhwndz/canvas-lms,greyhwndz/canvas-lms,antoniuslin/canvas-lms,shidao-fm/canvas-lms,redconfetti/canvas-lms,skmezanul/canvas-lms,djbender/canvas-lms,jay3126/canvas-lms,venturehive/canvas-lms,grahamb/canvas-lms,grahamb/canvas-lms,fronteerio/canvas-lms,samuels410/greatlakes-lms,whalejasmine/canvas-lms