main: disable default macos menu item

src/main/utils/Menus.js

@@ -0,0 +1,11 @@
+import { systemPreferences } from 'electron'
+import Constants from './Constants'
+
+export default class Menus {
+  static macOSDisableDefaultMenuItem () {
+    if (Constants.IS_MAC) {
+      systemPreferences.setUserDefault('NSDisabledDictationMenuItem', 'boolean', true)
+      systemPreferences.setUserDefault('NSDisabledCharacterPaletteMenuItem', 'boolean', true)
+    }
+  }
+}