Media: After [46237] add the same fix to the .button-group on the "Insert form URL" screen in the media modal.

Props afercia, sabernhardt.
FIxes #48087.

git-svn-id: https://develop.svn.wordpress.org/trunk@46567 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/css/media-views.css

@@ -2268,6 +2268,7 @@
 }
 
 /* Buttons group in IE 11. */
+.media-frame .setting-group .button-group,
 .image-details .embed-media-settings .setting .button-group {
 	width: auto;
 }