speed up json import

speed up json config file import, you should see it happend

ShadowsocksX-NG/Info.plist

@@ -48,7 +48,7 @@
 		</dict>
 	</array>
 	<key>CFBundleVersion</key>
-	<string>1</string>
+	<string>2</string>
 	<key>LSApplicationCategoryType</key>
 	<string>public.app-category.utilities</string>
 	<key>LSMinimumSystemVersion</key>

ShadowsocksX-NG/ServerProfileManager.swift

@@ -113,8 +113,8 @@ class ServerProfileManager: NSObject {
                         }
                         self.profiles.append(profile)
                         self.save()
-                        NotificationCenter.default.post(name: Notification.Name(rawValue: NOTIFY_SERVER_PROFILES_CHANGED), object: nil)
                     }
+                    NotificationCenter.default.post(name: Notification.Name(rawValue: NOTIFY_SERVER_PROFILES_CHANGED), object: nil)
                     let configsCount = (jsonArr1.object(forKey: "configs") as! [[String: AnyObject]]).count
                     let notification = NSUserNotification()
                     notification.title = "Import Server Profile succeed!".localized