message: fix: defaults settings values
  * fix: defaults settings values
  Fixes
  * fix: use homeassistant as discovery prefix
diff: export const state = {
  serial_ports: [],
  - zwave: {},
  - mqtt: {},
  + zwave: {
  + port: undefined,
  + commandsTimeout: 30,
  + networkKey: undefined,
  + logLevel: 'info',
  + logToFile: false
  + },
  + mqtt: {
  + name: 'zwavejs2mqtt',
  + host: 'localhost',
  + port: 1883,
  + qos: 1,
  + prefix: 'zwave',
  + reconnectPeriod: 3000,
  + retain: true,
  + clean: true,
  + auth: false,
  + username: undefined,
  + password: undefined
  + },
  devices: [],
  - gateway: {}
  + gateway: {
  + type: 0,
  + payloadType: 0,
  + nodeNames: true,
  + hassDiscovery: true,
  + discoveryPrefix: 'homeassistant',
  + logEnabled: true,
  + logLevel: 'info',
  + logToFile: false
  + }
  }
  export const getters = {
  @@ -30,9 +57,9 @@ export const actions = {
  export const mutations = {
  initSettings (state, conf) {
  if (conf) {
  - state.zwave = conf.zwave || {}
  - state.mqtt = conf.mqtt || {}
  - state.gateway = conf.gateway || {}
  + Object.assign(state.zwave, conf.zwave || {})
  + Object.assign(state.mqtt, conf.mqtt || {})
  + Object.assign(state.gateway, conf.gateway || {})
  }
  },
  initPorts (state, ports) {
  