Apply suggestions from code review

Co-authored-by: bjoern <r10s@b44t.com>

node/events.js

@@ -37,5 +37,5 @@ module.exports = {
   2111: 'DC_EVENT_CONFIG_SYNCED',
   2120: 'DC_EVENT_WEBXDC_STATUS_UPDATE',
   2121: 'DC_EVENT_WEBXDC_INSTANCE_DELETED',
-  2200: 'DC_EVENT_BACKGROUND_FETCH_COMPLETED_FOR_ALL_ACCOUNTS'
+  2200: 'DC_EVENT_ACCOUNTS_BACKGROUND_FETCH_DONE'
 }