Update TbHtml.php

When use:

<?php echo TbHtml::formActions(array(
TbHtml::submitButton(Yii::t('app', 'Login'), array('color' => TbHtml::BUTTON_COLOR_PRIMARY)),
TbHtml::resetButton(Yii::t('app', 'Reset')),
)); ?>

both buttons are rendered without gap between them, when there is a space, is drawn with a slight gap as:

<div class="form-actions">
<?php echo TbHtml::submitButton(Yii::t('app', 'Search'),  array('color' => TbHtml::BUTTON_COLOR_PRIMARY,));?>
<?php echo TbHtml::resetButton(Yii::t('app', 'Reset')); ?>
</div>

With TbHtml::formActions:
![captura de pantalla 2013-07-31 a la s 12 45 27](https://f.cloud.github.com/assets/2007152/887699/aa41bb1a-fa00-11e2-929e-705030ae7014.png)
With <div class="form-actions">...</div>
![captura de pantalla 2013-07-31 a la s 12 45 15](https://f.cloud.github.com/assets/2007152/887698/aa15e5c6-fa00-11e2-8c60-1f0a9615c5bf.png)