Use alternate insertion path for html
Use alternate insertion path for html

closes CNVS-20986

Solves the problem of trying to link something that's not text
(like an image)

TEST PLAN:
 1) go to an RCE
 2) put in some text
 3) put in an image
 4) try to link both
 5) the text should get a nice link wrapper as normal
 6) the image should not become linked escaped HTML (you should
  still be able to see the image)

Change-Id: Ie5a7d5d09f23948cd878e2b31c184441fbbed6dd
Reviewed-on: https://gerrit.instructure.com/55882
Reviewed-by: Josh Simpson <bfb4987b134a00f73d881fff5113b1d5fa1876bc@instructure.com>
QA-Review: August Thornton <9adc7a1161ddf32ff608de792a7e50179545f026@instructure.com>
Tested-by: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>
Product-Review: Ethan Vizitei <73eeb0b2f65d05a906adf3b21ee1f9f5a2aa3c1c@instructure.com>

roxolan/canvas-lms,instructure/canvas-lms,kyroskoh/canvas-lms,shidao-fm/canvas-lms,instructure/canvas-lms,leftplusrightllc/canvas-lms,redconfetti/canvas-lms,dgynn/canvas-lms,roxolan/canvas-lms,AndranikMarkosyan/lms,greyhwndz/canvas-lms,skmezanul/canvas-lms,tgroshon/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,shidao-fm/canvas-lms,antoniuslin/canvas-lms,redconfetti/canvas-lms,Jyaasa/canvas-lms,wrdsb/canvas-lms,ShreniiNepal/shrenii_lmp,leftplusrightllc/canvas-lms,narigone/canvas,Rvor/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,wrdsb/canvas-lms,Jyaasa/canvas-lms,dgynn/canvas-lms,shidao-fm/canvas-lms,grahamb/canvas-lms,HotChalk/canvas-lms,Rvor/canvas-lms,matematikk-mooc/canvas-lms,skmezanul/canvas-lms,snehakachroo1/LSI_replica,utkarshx/canvas-lms,sdeleon28/canvas-lms,Rvor/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,narigone/canvas,jay3126/canvas-lms,dgynn/canvas-lms,SwinburneOnline/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,whalejasmine/canvas-lms,antoniuslin/canvas-lms,shidao-fm/canvas-lms,snehakachroo1/LSI_replica,ShreniiNepal/shrenii_lmp,tgroshon/canvas-lms,whalejasmine/canvas-lms,snehakachroo1/LSI_replica,jay3126/canvas-lms,redconfetti/canvas-lms,tgroshon/canvas-lms,juoni/canvas-lms,matematikk-mooc/canvas-lms,SwinburneOnline/canvas-lms,skmezanul/canvas-lms,efrj/canvas-lms,snehakachroo1/LSI_replica,tgroshon/canvas-lms,matematikk-mooc/canvas-lms,venturehive/canvas-lms,fronteerio/canvas-lms,efrj/canvas-lms,wrdsb/canvas-lms,grahamb/canvas-lms,utkarshx/canvas-lms,AndranikMarkosyan/lms,grahamb/canvas-lms,sfu/canvas-lms,HotChalk/canvas-lms,juoni/canvas-lms,efrj/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,eCNAP/CANVAS,eCNAP/CANVAS,kyroskoh/canvas-lms,antoniuslin/canvas-lms,HotChalk/canvas-lms,narigone/canvas,djbender/canvas-lms,eCNAP/CANVAS,sdeleon28/canvas-lms,Rvor/canvas-lms,leftplusrightllc/canvas-lms,SwinburneOnline/canvas-lms,venturehive/canvas-lms,roxolan/canvas-lms,juoni/canvas-lms,Jyaasa/canvas-lms,greyhwndz/canvas-lms,ShreniiNepal/shrenii_lmp,redconfetti/canvas-lms,antoniuslin/canvas-lms,jay3126/canvas-lms,fronteerio/canvas-lms,SwinburneOnline/canvas-lms,sdeleon28/canvas-lms,AndranikMarkosyan/lms,utkarshx/canvas-lms,leftplusrightllc/canvas-lms,greyhwndz/canvas-lms,dgynn/canvas-lms,ShreniiNepal/shrenii_lmp,efrj/canvas-lms,instructure/canvas-lms,AndranikMarkosyan/lms,matematikk-mooc/canvas-lms,wrdsb/canvas-lms,utkarshx/canvas-lms,grahamb/canvas-lms,jay3126/canvas-lms,kyroskoh/canvas-lms,HotChalk/canvas-lms,whalejasmine/canvas-lms,sdeleon28/canvas-lms,sfu/canvas-lms,Jyaasa/canvas-lms,sfu/canvas-lms,fronteerio/canvas-lms,narigone/canvas,venturehive/canvas-lms,greyhwndz/canvas-lms,whalejasmine/canvas-lms,juoni/canvas-lms,grahamb/canvas-lms,skmezanul/canvas-lms,fronteerio/canvas-lms,kyroskoh/canvas-lms,eCNAP/CANVAS