When inserting an image into a post, the values in `wp.media.controller.Library` should not default to linking the image when no user settings are present.
The default display setting value for `link` is now `none`. User settings persist and will override or confirm this value based on user actions.
Props liljimmi, janhenckens, eherman24, wonderboymusic.
Fixes#31467.
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git-svn-id: http://core.svn.wordpress.org/trunk@33697 1a063a9b-81f0-0310-95a4-ce76da25c4cd