Set search button class to .button

git-svn-id: http://svn.automattic.com/wordpress/trunk@9563 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/edit.php

@@ -151,7 +151,7 @@ endif;
 <p class="search-box">
 	<label class="hidden" for="post-search-input"><?php _e( 'Search Posts' ); ?>:</label>
 	<input type="text" class="search-input" id="post-search-input" name="s" value="<?php the_search_query(); ?>" />
-	<input type="submit" value="<?php _e( 'Search Posts' ); ?>" class="button-primary" />
+	<input type="submit" value="<?php _e( 'Search Posts' ); ?>" class="button" />
 </p>
 
 <?php if ( isset($_GET['post_status'] ) ) : ?>