Fix bug introduced in [50829] that caused media modal to only load the selected image. Executes `.more()` when loading the modal to ensure that the media collection is available.
Props benitolopez, hellofromTonya, peterwilsoncc, danielbachhuber, PieWP, sabernhardt, szaqal21.
Fixes#53765.
Built from https://develop.svn.wordpress.org/trunk@52167
git-svn-id: http://core.svn.wordpress.org/trunk@51759 1a063a9b-81f0-0310-95a4-ce76da25c4cd