Fix invisible buttons.

Fixes #2802

lib/Cake/Test/Case/View/Helper/FormHelperTest.php

@@ -5974,7 +5974,7 @@ class FormHelperTest extends CakeTestCase {
 	public function testPostButton() {
 		$result = $this->Form->postButton('Hi', '/controller/action');
 		$this->assertTags($result, array(
-			'form' => array('method' => 'post', 'action' => '/controller/action', 'accept-charset' => 'utf-8', 'style' => 'display:none;'),
+			'form' => array('method' => 'post', 'action' => '/controller/action', 'accept-charset' => 'utf-8'),
 			'div' => array('style' => 'display:none;'),
 			'input' => array('type' => 'hidden', 'name' => '_method', 'value' => 'POST'),
 			'/div',
@@ -6000,7 +6000,6 @@ class FormHelperTest extends CakeTestCase {
 		$expected = array(
 			'form' => array(
 				'method' => 'post', 'action' => '/posts/delete/1', 'accept-charset' => 'utf-8',
-				'style' => 'display:none;'
 			),
 			array('div' => array('style' => 'display:none;')),
 			array('input' => array('type' => 'hidden', 'name' => '_method', 'value' => 'POST')),

lib/Cake/View/Helper/FormHelper.php

@@ -1545,7 +1545,7 @@ class FormHelper extends AppHelper {
 /**
  * Create a `<button>` tag with a surrounding `<form>` that submits via POST.
  *
- * This method creates a `<form>` element. So do not use this method in some opened form.
+ * This method creates a `<form>` element. So do not use this method in an already opened form.
  * Instead use FormHelper::submit() or FormHelper::button() to create buttons inside opened forms.
  *
  * ### Options:
@@ -1560,7 +1560,7 @@ class FormHelper extends AppHelper {
  * @link http://book.cakephp.org/2.0/en/core-libraries/helpers/form.html#FormHelper::postButton
  */
 	public function postButton($title, $url, $options = array()) {
-		$out = $this->create(false, array('id' => false, 'url' => $url, 'style' => 'display:none;'));
+		$out = $this->create(false, array('id' => false, 'url' => $url));
 		if (isset($options['data']) && is_array($options['data'])) {
 			foreach ($options['data'] as $key => $value) {
 				$out .= $this->hidden($key, array('value' => $value, 'id' => false));