增加“关闭时最小化到托盘”的设置 (#166)

添加托盘设置，调整主进程代码架构

src/main/rendererEvents/trafficLight.js

@@ -0,0 +1,22 @@
+// const { app } = require('electron')
+const { mainOn } = require('../../common/ipc')
+
+mainOn('min', event => {
+  if (global.mainWindow) {
+    global.mainWindow.minimize()
+  }
+})
+mainOn('max', event => {
+  if (global.mainWindow) {
+    global.mainWindow.maximize()
+  }
+})
+mainOn('close', (event, params) => {
+  if (global.mainWindow) {
+    // console.log('close', params)
+    if (params && params.isToTray) return global.mainWindow.hide()
+    // global.mainWindowdow.destroy()
+    // app.quit()
+    global.mainWindow.close()
+  }
+})