doc clarification on event
doc clarification on event

guo7711/offline-editor-js,EnzeZY/offline-editor-js,EnzeZY/offline-editor-js,Ricardh522/offline-editor-js,EnzeZY/offline-editor-js,eregn001/TPSEricTest1,Esri/offline-editor-js,plaxdan/offline-editor-js,degathem/offline-editor-js,andygup/offline-editor-js,eregn001/test5,guo7711/offline-editor-js,andygup/offline-editor-js,Esri/offline-editor-js,plaxdan/offline-editor-js,eregn001/test5,Ricardh522/offline-editor-js,eregn001/test5,andygup/offline-editor-js,guo7711/offline-editor-js,degathem/offline-editor-js,eregn001/TPSEricTest1,eregn001/TPSEricTest1,Ricardh522/offline-editor-js,degathem/offline-editor-js,Esri/offline-editor-js,plaxdan/offline-editor-js