Customize: Remove gap above section contained in panel when initially focusing on control.

Props mattwiebe.
Fixes #36050.


git-svn-id: https://develop.svn.wordpress.org/trunk@36805 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/js/customize-controls.js

@@ -685,7 +685,7 @@
 						// Fix the height after browser resize.
 						$( window ).on( 'resize.customizer-section', _.debounce( resizeContentHeight, 100 ) );
 
-						section._recalculateTopMargin();
+						setTimeout( _.bind( section._recalculateTopMargin, section ), 0 );
 					};
 				}