Fix #382 - Not all plugins are unregistered on destroy.
Fix #382 - Not all plugins are unregistered on destroy.

fortesl/SlickGrid,dbirchak/SlickGrid,thationothe/SlickGrid,cheminfo/SlickGrid,msuchoi/Coffee,helin16/SlickGrid,6pac/SlickGrid,mleibman/SlickGrid,fortesl/SlickGrid,songyaos/SlickGrid,zamabraga/SlickGrid,codexp/SlickGrid,JonBons/SlickGrid-DraggableGrouping-SummaryFooters,pandell/SlickGrid,TedDBarr/SlickGrid,trazyn/SlickGrid-mini,mindmatters/SlickGrid,vinicius5581/SlickGrid,msuchoi/Coffee,cjsigler/SGrid,Medisapiens/SlickGrid,csgsolutions/SlickGrid,priyaaanand/SlickGrid,nagasudhirpulla/SlickGrid,doctor41/SlickGrid,pirasis-l/SlickGrid,iCoreSolutions/SlickGrid,dynamicaction/SlickGrid,benjaminRomano/bd-SlickGrid,trazyn/SlickGrid-mini,ceanota/SlickGrid,steelsojka/SlickGrid,iCoreSolutions/SlickGrid,gofflab/neuron-seq-site,Infowatch/SlickGrid,TedDBarr/SlickGrid,dandy/SlickGrid,dandy/SlickGrid,coatue-oss/slickgrid2,pandell/SlickGrid,FactLook/SlickGrid,ddomingues/X-SlickGrid,K2InformaticsGmbH/SlickGrid,msuchoi/Coffee,RobertoMalatesta/SlickGrid,GerHobbelt/SlickGrid,jiangzhixiao/SlickGrid,Termato/SlickGrid,gbark/SlickGrid,doctor41/SlickGrid,varunkumar/slickgrid-mleibman,cheminfo/SlickGrid,Revionics/SlickGrid,vinicius5581/SlickGrid,werture07/SlickGrid,SimplGy/SlickGrid,tradingtechnologies/SlickGrid,jesenko/SlickGrid,benjaminRomano/bd-SlickGrid,tradingtechnologies/SlickGrid,manju-reddys/SlickGrid,jesenko/SlickGrid,steelsojka/SlickGrid,werture07/SlickGrid,mleibman/SlickGrid,priyaaanand/SlickGrid,songyaos/SlickGrid,6pac/SlickGrid,coatue/SlickGrid,gofflab/neuron-seq-site,mindmatters/SlickGrid,coatue-oss/slickgrid2,jiangzhixiao/SlickGrid,GerHobbelt/SlickGrid,ceanota/SlickGrid,GerHobbelt/SlickGrid,coatue/SlickGrid,nagasudhirpulla/SlickGrid,helin16/SlickGrid,yamass/SlickGrid,Revionics/SlickGrid,RobertoMalatesta/SlickGrid,csgsolutions/SlickGrid,matrix1992/SlickGrid,yamass/SlickGrid,JLynch7/SlickGrid,lanwan/SlickGrid,redabakr/SlickGrid,chrisghost/X-SlickGrid,coatue/SlickGrid,Termato/SlickGrid,redabakr/SlickGrid,dynamicaction/SlickGrid,cheminfo/SlickGrid,zartata/SlickGrid,Celebio/SlickGrid,matrix1992/SlickGrid,ddomingues/X-SlickGrid,lgsunnyvale/eFinancialModel,peaceboy/SlickGrid,zamabraga/SlickGrid,peaceboy/SlickGrid,FactLook/SlickGrid,gofflab/neuron-seq-site,chrisghost/X-SlickGrid,concord-consortium/codap-SlickGrid,manju-reddys/SlickGrid,codexp/SlickGrid,thationothe/SlickGrid,Infowatch/SlickGrid,lanwan/SlickGrid,gofflab/neuron-seq-site,msuchoi/Coffee,dbirchak/SlickGrid,SimplGy/SlickGrid,zartata/SlickGrid