Makes sure attachment sizes are correctly deselected in IE. Fixes size selections on insert in IE9. props koopersmith. fixes #22851. for the 3.5 branch.

git-svn-id: http://core.svn.wordpress.org/branches/3.5@23164 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-views.js

@@ -3900,10 +3900,11 @@
 				$value = $setting.find('[value="' + value + '"]');
 
 				if ( $value.length ) {
+					$setting.find('option').prop( 'selected', false );
 					$value.prop( 'selected', true );
 				} else {
 					// If we can't find the desired value, record what *is* selected.
-					this.model.set( $setting.data('setting'), $setting.find(':selected').val() );
+					this.model.set( key, $setting.find(':selected').val() );
 				}