Fix regressions from [32649] wrt Customizer expanded and active state changes for sections.

The `args.completeCallback` was not always called when `onChangeExpanded()` was called. And when a section became inactive (`active` state goes to `false`) and it was currently `expanded`, the Customizer panel would then becomes blank as the section was hidden; it needed to `collapse()` the section first before hiding the element.

See #31336.


Built from https://develop.svn.wordpress.org/trunk@32743


git-svn-id: http://core.svn.wordpress.org/trunk@32714 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32742';
+$wp_version = '4.3-alpha-32743';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.