merged branch bschussek/button-fix (PR #7800)

This PR was merged into the master branch.

Discussion
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[Form] Fixed missing label in button

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Commits
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6671b32 [Form] Fixed missing label in button

Author: fabpot

Resources/views/Form/button_widget.html.php

@@ -1,4 +1,2 @@
 <?php if (!$label) { $label = $view['form']->humanize($name); } ?>
-<button type="<?php echo isset($type) ? $view->escape($type) : 'button' ?>" <?php echo $view['form']->block($form, 'button_attributes') ?>>
-    <?php $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?>
-</button>
+<button type="<?php echo isset($type) ? $view->escape($type) : 'button' ?>" <?php echo $view['form']->block($form, 'button_attributes') ?>><?php echo $view->escape($view['translator']->trans($label, array(), $translation_domain)) ?></button>