fix round CSS for count bubbles
fix round CSS for count bubbles

fixes CNVS-13229

test plan:
  * open Canvas as a user with unread messages
  * verify that the unread count in your header is rounded
  * open your dashboard
  * verify that the new items count bubbles are rounded

Change-Id: I7a8b244101c4d49454692b91a6623a466eeb776a
Reviewed-on: https://gerrit.instructure.com/36067
Reviewed-by: Simon Williams <088e16a1019277b15d58faf0541e11910eb756f6@instructure.com>
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
QA-Review: Steven Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Product-Review: Braden Anderson <a6cc2cef7d25f27847876bdb81651755fcebacf0@instructure.com>

wye0220/shindig-canvas,utkarshx/canvas-lms,fronteerio/canvas-lms,roxolan/canvas-lms,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,leftplusrightllc/canvas-lms,samuels410/greatlakes-lms,antoniuslin/canvas-lms,grahamb/canvas-lms,efrj/canvas-lms,leftplusrightllc/canvas-lms,jay3126/canvas-lms,sdeleon28/canvas-lms,fronteerio/canvas-lms,whalejasmine/canvas-lms,kyroskoh/canvas-lms,usmschuck/canvas,usmschuck/canvas,whalejasmine/canvas-lms,jay3126/canvas-lms,antoniuslin/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,jay3126/canvas-lms,sfu/canvas-lms,kyroskoh/canvas-lms,utkarshx/canvas-lms,shidao-fm/canvas-lms,SwinburneOnline/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,leftplusrightllc/canvas-lms,roxolan/canvas-lms,redconfetti/canvas-lms,usmschuck/canvas,HotChalk/canvas-lms,skmezanul/canvas-lms,efrj/canvas-lms,jay3126/canvas-lms,HotChalk/canvas-lms,Rvor/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,juoni/canvas-lms,grahamb/canvas-lms,juoni/canvas-lms,sfu/canvas-lms,juoni/canvas-lms,Rvor/canvas-lms,ShreniiNepal/shrenii_lmp,sfu/canvas-lms,sdeleon28/canvas-lms,whalejasmine/canvas-lms,sdeleon28/canvas-lms,HotChalk/canvas-lms,SwinburneOnline/canvas-lms,Rvor/canvas-lms,samuels410/greatlakes-lms,efrj/canvas-lms,Jyaasa/canvas-lms,Unow/canvas-lms,redconfetti/canvas-lms,redconfetti/canvas-lms,skmezanul/canvas-lms,va7map/canvas-lms,ShreniiNepal/shrenii_lmp,redconfetti/canvas-lms,utkarshx/canvas-lms,skmezanul/canvas-lms,fronteerio/canvas-lms,kyroskoh/canvas-lms,djbender/canvas-lms,wrdsb/canvas-lms,grahamb/canvas-lms,venturehive/canvas-lms,fronteerio/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,wye0220/shindig-canvas,wrdsb/canvas-lms,djbender/canvas-lms,SwinburneOnline/canvas-lms,Unow/canvas-lms,efrj/canvas-lms,juoni/canvas-lms,kyroskoh/canvas-lms,shidao-fm/canvas-lms,leftplusrightllc/canvas-lms,SwinburneOnline/canvas-lms,utkarshx/canvas-lms,HotChalk/canvas-lms,va7map/canvas-lms,tgroshon/canvas-lms,shidao-fm/canvas-lms,Unow/canvas-lms,roxolan/canvas-lms,wrdsb/canvas-lms,antoniuslin/canvas-lms,usmschuck/canvas,samuels410/greatlakes-lms,Jyaasa/canvas-lms,shidao-fm/canvas-lms,Jyaasa/canvas-lms,tgroshon/canvas-lms,whalejasmine/canvas-lms,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,sfu/canvas-lms,roxolan/canvas-lms,va7map/canvas-lms,antoniuslin/canvas-lms,samuels410/greatlakes-lms,greyhwndz/canvas-lms,greyhwndz/canvas-lms,skmezanul/canvas-lms,grahamb/canvas-lms,greyhwndz/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,va7map/canvas-lms,sdeleon28/canvas-lms,wye0220/shindig-canvas,greyhwndz/canvas-lms,djbender/canvas-lms,Jyaasa/canvas-lms