Process deferred scripts less often
Process deferred scripts less often

Only do it from finish_load when a stylesheet finished loading, and from
deferred_script_loaded directly.

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