Avoid creating multiple scroll roots for sticky tables
Avoid creating multiple scroll roots for sticky tables

This should prevent problems when a table has position:sticky and
overflow:scroll.

paulrouget/servo,pyfisch/servo,mattnenterprise/servo,dsandeephegde/servo,cbrewster/servo,szeged/servo,jimberlage/servo,saneyuki/servo,KiChjang/servo,CJ8664/servo,pyfisch/servo,CJ8664/servo,notriddle/servo,paulrouget/servo,emilio/servo,dati91/servo,cbrewster/servo,splav/servo,splav/servo,paulrouget/servo,szeged/servo,avadacatavra/servo,upsuper/servo,peterjoel/servo,anthgur/servo,SimonSapin/servo,dati91/servo,notriddle/servo,dsandeephegde/servo,nnethercote/servo,canaltinova/servo,thiagopnts/servo,fiji-flo/servo,szeged/servo,rnestler/servo,larsbergstrom/servo,DominoTree/servo,saneyuki/servo,mbrubeck/servo,cbrewster/servo,larsbergstrom/servo,mbrubeck/servo,DominoTree/servo,fiji-flo/servo,eddyb/servo,szeged/servo,paulrouget/servo,nnethercote/servo,upsuper/servo,fiji-flo/servo,pyfisch/servo,canaltinova/servo,DominoTree/servo,dati91/servo,mbrubeck/servo,notriddle/servo,thiagopnts/servo,pyfisch/servo,emilio/servo,thiagopnts/servo,jimberlage/servo,KiChjang/servo,saneyuki/servo,canaltinova/servo,eddyb/servo,canaltinova/servo,upsuper/servo,cbrewster/servo,saneyuki/servo,SimonSapin/servo,dati91/servo,KiChjang/servo,jimberlage/servo,thiagopnts/servo,peterjoel/servo,larsbergstrom/servo,emilio/servo,notriddle/servo,DominoTree/servo,mattnenterprise/servo,canaltinova/servo,eddyb/servo,peterjoel/servo,larsbergstrom/servo,SimonSapin/servo,upsuper/servo,sadmansk/servo,SimonSapin/servo,pyfisch/servo,fiji-flo/servo,rnestler/servo,emilio/servo,paulrouget/servo,larsbergstrom/servo,SimonSapin/servo,SimonSapin/servo,peterjoel/servo,emilio/servo,larsbergstrom/servo,jimberlage/servo,avadacatavra/servo,avadacatavra/servo,dsandeephegde/servo,splav/servo,rnestler/servo,avadacatavra/servo,notriddle/servo,peterjoel/servo,avadacatavra/servo,saneyuki/servo,cbrewster/servo,nnethercote/servo,jimberlage/servo,saneyuki/servo,nnethercote/servo,anthgur/servo,pyfisch/servo,notriddle/servo,cbrewster/servo,CJ8664/servo,nnethercote/servo,szeged/servo,pyfisch/servo,szeged/servo,nnethercote/servo,paulrouget/servo,jimberlage/servo,eddyb/servo,ConnorGBrewster/servo,DominoTree/servo,CJ8664/servo,saneyuki/servo,larsbergstrom/servo,jimberlage/servo,splav/servo,peterjoel/servo,sadmansk/servo,emilio/servo,DominoTree/servo,KiChjang/servo,rnestler/servo,dati91/servo,paulrouget/servo,DominoTree/servo,ConnorGBrewster/servo,sadmansk/servo,dati91/servo,CJ8664/servo,notriddle/servo,ConnorGBrewster/servo,mbrubeck/servo,thiagopnts/servo,cbrewster/servo,CJ8664/servo,thiagopnts/servo,mbrubeck/servo,mattnenterprise/servo,DominoTree/servo,avadacatavra/servo,ConnorGBrewster/servo,larsbergstrom/servo,pyfisch/servo,jimberlage/servo,dsandeephegde/servo,mattnenterprise/servo,canaltinova/servo,rnestler/servo,rnestler/servo,dsandeephegde/servo,anthgur/servo,splav/servo,CJ8664/servo,CJ8664/servo,SimonSapin/servo,splav/servo,avadacatavra/servo,anthgur/servo,splav/servo,emilio/servo,mbrubeck/servo,pyfisch/servo,mattnenterprise/servo,peterjoel/servo,ConnorGBrewster/servo,nnethercote/servo,mbrubeck/servo,dati91/servo,avadacatavra/servo,rnestler/servo,peterjoel/servo,szeged/servo,mattnenterprise/servo,KiChjang/servo,cbrewster/servo,saneyuki/servo,SimonSapin/servo,splav/servo,DominoTree/servo,KiChjang/servo,sadmansk/servo,sadmansk/servo,eddyb/servo,notriddle/servo,anthgur/servo,nnethercote/servo,KiChjang/servo,dsandeephegde/servo,saneyuki/servo,upsuper/servo,dsandeephegde/servo,ConnorGBrewster/servo,szeged/servo,ConnorGBrewster/servo,ConnorGBrewster/servo,dati91/servo,jimberlage/servo,anthgur/servo,nnethercote/servo,emilio/servo,DominoTree/servo,mattnenterprise/servo,canaltinova/servo,emilio/servo,paulrouget/servo,sadmansk/servo,notriddle/servo,larsbergstrom/servo,peterjoel/servo,thiagopnts/servo,splav/servo,eddyb/servo,rnestler/servo,fiji-flo/servo,szeged/servo,emilio/servo,fiji-flo/servo,upsuper/servo,canaltinova/servo,KiChjang/servo,peterjoel/servo,upsuper/servo,anthgur/servo,notriddle/servo,fiji-flo/servo,dsandeephegde/servo,eddyb/servo,KiChjang/servo,szeged/servo,splav/servo,larsbergstrom/servo,eddyb/servo,paulrouget/servo,anthgur/servo,sadmansk/servo,sadmansk/servo,mattnenterprise/servo,paulrouget/servo,thiagopnts/servo,mbrubeck/servo,upsuper/servo,nnethercote/servo,saneyuki/servo,KiChjang/servo,fiji-flo/servo,pyfisch/servo