Load images when the Updates preference prevents downloading

The default preferences under Updates includes

• Over Wi-Fi: Always use this connection when available
• Over Data: Only use this connection when I click to download

(Surprisingly,) the image loading preferences respects the Updates downloading preferences. That is, by default, images won't load when the connection is over Data, which causes confusions from the users.

It's at least counter-intuitive that the image loading preferences has anything to do with the Updates downloading preferences. Also, images are much smaller than the apks. It's rare that you need to disable images to save data unless you live in a country with high network fee. At least they belongs to different levels and disabling images shouldn't be on by default.

Therefore, this proposal includes 2 parts:

• Don't let the Updates downloading preferences control the image loading
• Show images by default and/or add an independent preference for image loading control.