win: Fix notify icon and context menu.

atom/browser/api/lib/menu-item.coffee

@@ -44,9 +44,7 @@ class MenuItem
     Object.defineProperty this, name,
       enumerable: true
       get: => v8Util.getHiddenValue this, name
-      set: (val) =>
-        v8Util.setHiddenValue this, name, val
-        @menu?._updateStates()
+      set: (val) => v8Util.setHiddenValue this, name, val
 
   overrideReadOnlyProperty: (name, defaultValue=null) ->
     this[name] ?= defaultValue

atom/browser/api/lib/menu.coffee

@@ -76,9 +76,6 @@ Menu::insert = (pos, item) ->
             v8Util.setHiddenValue otherItem, 'checked', false
           v8Util.setHiddenValue item, 'checked', true
 
-          # Update states when clicked on Windows.
-          @_updateStates() if process.platform is 'win32'
-
       @insertRadioItem pos, item.commandId, item.label, item.groupId
 
   @setSublabel pos, item.sublabel if item.sublabel?