don't add a new link each time the dialog opens
don't add a new link each time the dialog opens

the privacy policy is important, but not that important

test plan:
1. open the "Add a New User" dialog multiple times (account page)
2. there should only ever be a single privact policy link

Change-Id: I509655e943304b99a2b7b2fb1aa96083089335ba
Reviewed-on: https://gerrit.instructure.com/18313
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Cam Theriault <b4133c36b6d893d0872cc09e87b536d16aa2d241@instructure.com>
Reviewed-by: Joe Tanner <16a9a54ddf4259952e3c118c763138e83693d7fd@instructure.com>

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