restore page title to courses/:id/users
restore page title to courses/:id/users

ensure page title actually gets set. this broke in a refactor

test plan:
1. go to a Course -> People
2. the title of the tab/window should be "Course Roster: The Course Name"

Change-Id: I9fb96c2669ccb1bac6ca265556cef0f627f05424
Reviewed-on: https://gerrit.instructure.com/20404
Reviewed-by: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Cam Theriault <b4133c36b6d893d0872cc09e87b536d16aa2d241@instructure.com>
Product-Review: Jon Jensen <44f878afe53efc66b76772bd845eb65944ed8232@instructure.com>

arrivu/hoodemo,jay3126/canvas-lms,redconfetti/canvas-lms,arrivu/hoodemo,leftplusrightllc/canvas-lms,antoniuslin/canvas-lms,wimemx/Canvas,Unow/ins,wye0220/shindig-canvas,roxolan/canvas-lms,Unow/canvas-lms,usmschuck/canvas,landonwilkins/canvas-lms,matematikk-mooc/canvas-lms,arrivu/qibla-ecampus,snehakachroo1/LSI_replica,wimemx/Canvas,AndranikMarkosyan/lms,instructure/canvas-lms,ShreniiNepal/shrenii_lmp,venturehive/canvas-lms,Unow/canvas-lms,whalejasmine/canvas-lms,Rvor/canvas-lms,antoniuslin/canvas-lms,matematikk-mooc/canvas-lms,greyhwndz/canvas-lms,utkarshx/canvas-lms,landonwilkins/canvas-lms,tgroshon/canvas-lms,skmezanul/canvas-lms,va7map/canvas-lms,sdeleon28/canvas-lms,instructure/canvas-lms,wimemx/Canvas,grahamb/canvas-lms,snehakachroo1/LSI_replica,grahamb/canvas-lms,djbender/canvas-lms,venturehive/canvas-lms,HotChalk/canvas-lms,Rvor/canvas-lms,Jyaasa/canvas-lms,samuels410/greatlakes-lms,leftplusrightllc/canvas-lms,wrdsb/canvas-lms,juoni/canvas-lms,kyroskoh/canvas-lms,whalejasmine/canvas-lms,sdeleon28/canvas-lms,shidao-fm/canvas-lms,djbender/canvas-lms,arrivu/jigsaw-lms,kyroskoh/canvas-lms,Jyaasa/canvas-lms,djbender/canvas-lms,landonwilkins/canvas-lms,shidao-fm/canvas-lms,wrdsb/canvas-lms,landonwilkins/canvas-lms,ShreniiNepal/shrenii_lmp,grahamb/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,AndranikMarkosyan/lms,redconfetti/canvas-lms,fronteerio/canvas-lms,arrivu/arrivu-lms,efrj/canvas-lms,HotChalk/canvas-lms,usmschuck/canvas,juoni/canvas-lms,eCNAP/CANVAS,sfu/canvas-lms,arrivu/jigsaw-lms,grahamb/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,merichar/canvas-lms,arrivu/jigsaw-lms,HotChalk/canvas-lms,instructure/canvas-lms,venturehive/canvas-lms,loganrun/pincan,arrivu/arrivu-lms,gbleydon/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,skmezanul/canvas-lms,eCNAP/CANVAS,arrivu/qibla-ecampus,leftplusrightllc/canvas-lms,redconfetti/canvas-lms,samuels410/greatlakes-lms,skmezanul/canvas-lms,whalejasmine/canvas-lms,matematikk-mooc/canvas-lms,shidao-fm/canvas-lms,antoniuslin/canvas-lms,AndranikMarkosyan/lms,sdeleon28/canvas-lms,AndranikMarkosyan/lms,greyhwndz/canvas-lms,instructure/canvas-lms,wye0220/shindig-canvas,sfu/canvas-lms,Unow/canvas-lms,snehakachroo1/LSI_replica,sfu/canvas-lms,va7map/canvas-lms,Unow/ins,SwinburneOnline/canvas-lms,narigone/canvas,roxolan/canvas-lms,jay3126/canvas-lms,shidao-fm/canvas-lms,va7map/canvas-lms,skmezanul/canvas-lms,wrdsb/canvas-lms,loganrun/pincan,SwinburneOnline/canvas-lms,Rvor/canvas-lms,arrivu/qibla-ecampus,arrivu/hoodemo,leftplusrightllc/canvas-lms,juoni/canvas-lms,gbleydon/canvas-lms,tgroshon/canvas-lms,usmschuck/canvas,sfu/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,narigone/canvas,merichar/canvas-lms,narigone/canvas,wrdsb/canvas-lms,dgynn/canvas-lms,sdeleon28/canvas-lms,Jyaasa/canvas-lms,HotChalk/canvas-lms,ShreniiNepal/shrenii_lmp,juoni/canvas-lms,whalejasmine/canvas-lms,jay3126/canvas-lms,loganrun/pincan,utkarshx/canvas-lms,arrivu/arrivu-lms,gbleydon/canvas-lms,dgynn/canvas-lms,utkarshx/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,Rvor/canvas-lms,dgynn/canvas-lms,ShreniiNepal/shrenii_lmp,jay3126/canvas-lms,efrj/canvas-lms,tgroshon/canvas-lms,efrj/canvas-lms,kyroskoh/canvas-lms,fronteerio/canvas-lms,samuels410/greatlakes-lms,eCNAP/CANVAS,Jyaasa/canvas-lms,fronteerio/canvas-lms,kyroskoh/canvas-lms,snehakachroo1/LSI_replica,Unow/ins,utkarshx/canvas-lms,wye0220/shindig-canvas,merichar/canvas-lms,antoniuslin/canvas-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,matematikk-mooc/canvas-lms,grahamb/canvas-lms,efrj/canvas-lms,usmschuck/canvas,greyhwndz/canvas-lms,samuels410/greatlakes-lms,roxolan/canvas-lms,SwinburneOnline/canvas-lms,greyhwndz/canvas-lms,va7map/canvas-lms,narigone/canvas,eCNAP/CANVAS,instructure/canvas-lms,tgroshon/canvas-lms