updated mathquill, fixed cursor reset bug. closes #4486
updated mathquill, fixed cursor reset bug. closes #4486

Change-Id: I8f39cb77e0c27a182937e96942250e9931fa6faf
Reviewed-on: https://gerrit.instructure.com/3844
Tested-by: Hudson <dfb64870173313a9a7b56f814c8e3b33e268497a@instructure.com>
Tested-by: Selenium <781b4ea1d853666949b562451f4649afae1f85d5@instructure.com>
Reviewed-by: Brian Whitmer <760e7dab2836853c63805033e514668301fa9c47@instructure.com>

loganrun/pincan,tgroshon/canvas-lms,arrivu/qibla-ecampus,matematikk-mooc/canvas-lms,juoni/canvas-lms,narigone/canvas,va7map/canvas-lms,roxolan/canvas-lms,djbender/canvas-lms,narigone/canvas,arrivu/qibla-ecampus,arrivu/arrivu-lms,sdeleon28/canvas-lms,wrdsb/canvas-lms,venturehive/canvas-lms,Jyaasa/canvas-lms,antoniuslin/canvas-lms,wimemx/Canvas,redconfetti/canvas-lms,fronteerio/canvas-lms,sli7246/canvas_branch,narigone/canvas,loganrun/pincan,venturehive/canvas-lms,eCNAP/CANVAS,Unow/canvas-lms,icelab/canvas,sfu/canvas-lms,arrivu/arrivu-lms,dgynn/canvas-lms,parbros/red-innovadores-lms,skmezanul/canvas-lms,AndranikMarkosyan/lms,nditech/red-innovadores-lms,Jyaasa/canvas-lms,Unow/ins,AndranikMarkosyan/lms,nditech/red-innovadores-lms,narigone/canvas,skmezanul/canvas-lms,grahamb/canvas-lms,roxolan/canvas-lms,Unow/canvas-lms,roxolan/canvas-lms,sfu/canvas-lms,arrivu/hiring-site,fronteerio/canvas-lms,samuels410/greatlakes-lms,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,redconfetti/canvas-lms,arrivu/hiring-site,merichar/canvas-lms,grahamb/canvas-lms,ankithbti/canvas_lms,usmschuck/canvas,juoni/canvas-lms,Unow/canvas-lms,arrivu/hoodemo,AndranikMarkosyan/lms,shidao-fm/canvas-lms,instructure/canvas-lms,juoni/canvas-lms,nditech/red-innovadores-lms,arrivu/hoodemo,wrdsb/canvas-lms,wrdsb/canvas-lms,Rvor/canvas-lms,wrdsb/canvas-lms,faraazkhan/canvas,snehakachroo1/LSI_replica,efrj/canvas-lms,shidao-fm/canvas-lms,roxolan/canvas-lms,skmezanul/canvas-lms,leftplusrightllc/canvas-lms,antoniuslin/canvas-lms,dgynn/canvas-lms,kyroskoh/canvas-lms,dgynn/canvas-lms,faraazkhan/canvas,matematikk-mooc/canvas-lms,ankithbti/canvas_lms,usmschuck/canvas,ottenhoff/canvas-lms,whalejasmine/canvas-lms,sdeleon28/canvas-lms,samuels410/greatlakes-lms,rup/Tarrax,sdeleon28/canvas-lms,venturehive/canvas-lms,sfu/canvas-lms,Rvor/canvas-lms,skmezanul/canvas-lms,arrivu/jigsaw-lms,HotChalk/canvas-lms,em2/canvas-lms,efrj/canvas-lms,rup/Tarrax,instructure/canvas-lms,greyhwndz/canvas-lms,Rvor/canvas-lms,greyhwndz/canvas-lms,gbleydon/canvas-lms,wimemx/Canvas,arrivu/arrivu-lms,eCNAP/CANVAS,juoni/canvas-lms,landonwilkins/canvas-lms,samuels410/greatlakes-lms,gbleydon/canvas-lms,jay3126/canvas-lms,dgynn/canvas-lms,ShreniiNepal/shrenii_lmp,wye0220/shindig-canvas,faraazkhan/canvas,wye0220/shindig-canvas,whalejasmine/canvas-lms,jay3126/canvas-lms,landonwilkins/canvas-lms,snehakachroo1/LSI_replica,whalejasmine/canvas-lms,tgroshon/canvas-lms,arrivu/hoodemo,wimemx/Canvas,SwinburneOnline/canvas-lms,sdeleon28/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,arrivu/jigsaw-lms,samuels410/greatlakes-lms,sfu/canvas-lms,utkarshx/canvas-lms,landonwilkins/canvas-lms,loganrun/pincan,jay3126/canvas-lms,instructure/canvas-lms,wye0220/shindig-canvas,em2/canvas-lms,shidao-fm/canvas-lms,arrivu/jigsaw-lms,sfu/canvas-lms,Unow/ins,ShreniiNepal/shrenii_lmp,parbros/red-innovadores-lms,rup/Tarrax,sli7246/canvas_branch,HotChalk/canvas-lms,merichar/canvas-lms,djbender/canvas-lms,kyroskoh/canvas-lms,arrivu/hiring-site,kyroskoh/canvas-lms,eCNAP/CANVAS,nditech/red-innovadores-lms,SwinburneOnline/canvas-lms,greyhwndz/canvas-lms,leftplusrightllc/canvas-lms,instructure/canvas-lms,leftplusrightllc/canvas-lms,Jyaasa/canvas-lms,djbender/canvas-lms,usmschuck/canvas,gbleydon/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,kyroskoh/canvas-lms,greyhwndz/canvas-lms,sli7246/canvas_branch,SwinburneOnline/canvas-lms,whalejasmine/canvas-lms,eCNAP/CANVAS,Unow/ins,djbender/canvas-lms,icelab/canvas,antoniuslin/canvas-lms,fronteerio/canvas-lms,va7map/canvas-lms,HotChalk/canvas-lms,shidao-fm/canvas-lms,efrj/canvas-lms,jay3126/canvas-lms,Rvor/canvas-lms,redconfetti/canvas-lms,snehakachroo1/LSI_replica,utkarshx/canvas-lms,landonwilkins/canvas-lms,fronteerio/canvas-lms,Jyaasa/canvas-lms,ankithbti/canvas_lms,antoniuslin/canvas-lms,utkarshx/canvas-lms,SwinburneOnline/canvas-lms,efrj/canvas-lms,tgroshon/canvas-lms,instructure/canvas-lms,usmschuck/canvas,AndranikMarkosyan/lms,snehakachroo1/LSI_replica,utkarshx/canvas-lms,grahamb/canvas-lms,va7map/canvas-lms,matematikk-mooc/canvas-lms,va7map/canvas-lms,matematikk-mooc/canvas-lms,ottenhoff/canvas-lms,leftplusrightllc/canvas-lms,parbros/red-innovadores-lms,merichar/canvas-lms,ottenhoff/canvas-lms,em2/canvas-lms,icelab/canvas,venturehive/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,arrivu/qibla-ecampus,redconfetti/canvas-lms,ShreniiNepal/shrenii_lmp