MS: Align HTML structure in `wp-signup.php` and `wp-activate.php`.

Assigns the `wp-activate-container` and `wp-signup-container` to the container inside `#signup-container` on each. This container already existed in `wp-signup.php` and is new in `wp-activate.php`.

Props ocean90.
Fixes #25478.

Built from https://develop.svn.wordpress.org/trunk@34814


git-svn-id: http://core.svn.wordpress.org/trunk@34779 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-activate.php

@@ -68,6 +68,7 @@ get_header();
 ?>
 
 <div id="signup-content" class="widecolumn">
+	<div class="wp-activate-container">
 	<?php if ( empty($_GET['key']) && empty($_POST['key']) ) { ?>
 
 		<h2><?php _e('Activation Key Required') ?></h2>
@@ -127,6 +128,7 @@ get_header();
 		}
 	}
 	?>
+	</div>
 </div>
 <script type="text/javascript">
 	var key_input = document.getElementById('key');

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34813';
+$wp_version = '4.4-alpha-34814';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-signup.php

@@ -76,7 +76,7 @@ get_header();
 do_action( 'before_signup_form' );
 ?>
 <div id="signup-content" class="widecolumn">
-<div class="mu_register">
+<div class="mu_register wp-signup-container">
 <?php
 /**
  * Generates and displays the Signup and Create Site forms