Use .shadowRoot rather than .root to descend shadow dom
Use .shadowRoot rather than .root to descend shadow dom

Closes #4587

pabloferz/CodeMirror,schanzer/CodeMirror,SidPresse/CodeMirror,schanzer/CodeMirror,dperetti/CodeMirror,hackmdio/CodeMirror,notepadqq/CodeMirror,mtaran-google/CodeMirror,thomasjm/CodeMirror,hackmdio/CodeMirror,MarcelGerber/CodeMirror,ficristo/CodeMirror,thomasjm/CodeMirror,codio/CodeMirror,codio/CodeMirror,ejgallego/CodeMirror,SidPresse/CodeMirror,mtaran-google/CodeMirror,nightwing/CodeMirror,thomasjm/CodeMirror,kerabromsmu/CodeMirror,grzegorzmazur/CodeMirror,wingify/CodeMirror,jayaprabhakar/CodeMirror,notepadqq/CodeMirror,MarcelGerber/CodeMirror,jayaprabhakar/CodeMirror,nightwing/CodeMirror,notepadqq/CodeMirror,MarcelGerber/CodeMirror,schanzer/CodeMirror,wingify/CodeMirror,grzegorzmazur/CodeMirror,codio/CodeMirror,grzegorzmazur/CodeMirror,kerabromsmu/CodeMirror,jkaplon/CodeMirror,namin/CodeMirror,crazy4chrissi/CodeMirror,ficristo/CodeMirror,jayaprabhakar/CodeMirror,kerabromsmu/CodeMirror,jkaplon/CodeMirror,SidPresse/CodeMirror,hackmdio/CodeMirror,crazy4chrissi/CodeMirror,crazy4chrissi/CodeMirror,namin/CodeMirror,ejgallego/CodeMirror,wingify/CodeMirror,jkaplon/CodeMirror,pabloferz/CodeMirror,dperetti/CodeMirror,ficristo/CodeMirror,ejgallego/CodeMirror,mtaran-google/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,namin/CodeMirror,dperetti/CodeMirror