put drop arrow back on speed grader menu, fixes: #9533
put drop arrow back on speed grader menu, fixes: #9533

test plan:
open speegrader,
make sure there is a drop down arrow on the menu in the
header

Change-Id: Id9ff18345b245c67cc0976c4da859c1ff4d77a7a
Reviewed-on: https://gerrit.instructure.com/12339
Reviewed-by: Jake Sorce <c8d99c2f7cd5f432c163abcd422672b9f77550bb@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>

whalejasmine/canvas-lms,ankithbti/canvas_lms,wye0220/shindig-canvas,whalejasmine/canvas-lms,wrdsb/canvas-lms,Jyaasa/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,ShreniiNepal/shrenii_lmp,redconfetti/canvas-lms,arrivu/arrivu-lms,djbender/canvas-lms,tgroshon/canvas-lms,nditech/red-innovadores-lms,arrivu/arrivu-lms,landonwilkins/canvas-lms,arrivu/qibla-ecampus,wye0220/shindig-canvas,Rvor/canvas-lms,efrj/canvas-lms,Jyaasa/canvas-lms,loganrun/pincan,sfu/canvas-lms,samuels410/greatlakes-lms,landonwilkins/canvas-lms,juoni/canvas-lms,HotChalk/canvas-lms,utkarshx/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,usmschuck/canvas,jay3126/canvas-lms,tgroshon/canvas-lms,grahamb/canvas-lms,antoniuslin/canvas-lms,usmschuck/canvas,merichar/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,Jyaasa/canvas-lms,usmschuck/canvas,arrivu/jigsaw-lms,wye0220/shindig-canvas,whalejasmine/canvas-lms,redconfetti/canvas-lms,nditech/red-innovadores-lms,utkarshx/canvas-lms,utkarshx/canvas-lms,arrivu/hoodemo,antoniuslin/canvas-lms,rup/Tarrax,fronteerio/canvas-lms,samuels410/greatlakes-lms,sfu/canvas-lms,shidao-fm/canvas-lms,SwinburneOnline/canvas-lms,kyroskoh/canvas-lms,leftplusrightllc/canvas-lms,greyhwndz/canvas-lms,juoni/canvas-lms,skmezanul/canvas-lms,greyhwndz/canvas-lms,wimemx/Canvas,parbros/red-innovadores-lms,roxolan/canvas-lms,va7map/canvas-lms,parbros/red-innovadores-lms,Unow/ins,merichar/canvas-lms,sli7246/canvas_branch,wrdsb/canvas-lms,juoni/canvas-lms,merichar/canvas-lms,Rvor/canvas-lms,wrdsb/canvas-lms,fronteerio/canvas-lms,redconfetti/canvas-lms,sdeleon28/canvas-lms,leftplusrightllc/canvas-lms,SwinburneOnline/canvas-lms,ankithbti/canvas_lms,arrivu/qibla-ecampus,shidao-fm/canvas-lms,rup/Tarrax,djbender/canvas-lms,greyhwndz/canvas-lms,nditech/red-innovadores-lms,skmezanul/canvas-lms,Unow/ins,va7map/canvas-lms,efrj/canvas-lms,whalejasmine/canvas-lms,leftplusrightllc/canvas-lms,grahamb/canvas-lms,samuels410/greatlakes-lms,arrivu/hoodemo,ShreniiNepal/shrenii_lmp,sfu/canvas-lms,samuels410/greatlakes-lms,Unow/canvas-lms,loganrun/pincan,usmschuck/canvas,sli7246/canvas_branch,va7map/canvas-lms,ankithbti/canvas_lms,grahamb/canvas-lms,tgroshon/canvas-lms,efrj/canvas-lms,kyroskoh/canvas-lms,sdeleon28/canvas-lms,HotChalk/canvas-lms,shidao-fm/canvas-lms,antoniuslin/canvas-lms,rup/Tarrax,kyroskoh/canvas-lms,Unow/canvas-lms,wimemx/Canvas,redconfetti/canvas-lms,efrj/canvas-lms,sfu/canvas-lms,ShreniiNepal/shrenii_lmp,arrivu/hoodemo,sdeleon28/canvas-lms,va7map/canvas-lms,Rvor/canvas-lms,sfu/canvas-lms,greyhwndz/canvas-lms,SwinburneOnline/canvas-lms,Rvor/canvas-lms,djbender/canvas-lms,landonwilkins/canvas-lms,jay3126/canvas-lms,venturehive/canvas-lms,jay3126/canvas-lms,HotChalk/canvas-lms,landonwilkins/canvas-lms,nditech/red-innovadores-lms,shidao-fm/canvas-lms,wimemx/Canvas,arrivu/jigsaw-lms,Unow/ins,Unow/canvas-lms,fronteerio/canvas-lms,venturehive/canvas-lms,juoni/canvas-lms,roxolan/canvas-lms,parbros/red-innovadores-lms,antoniuslin/canvas-lms,sfu/canvas-lms,utkarshx/canvas-lms,arrivu/arrivu-lms,tgroshon/canvas-lms,sfu/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,venturehive/canvas-lms,sli7246/canvas_branch,fronteerio/canvas-lms,arrivu/qibla-ecampus,jay3126/canvas-lms,kyroskoh/canvas-lms,arrivu/jigsaw-lms,skmezanul/canvas-lms,wrdsb/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,loganrun/pincan,Jyaasa/canvas-lms,sdeleon28/canvas-lms,ShreniiNepal/shrenii_lmp