CC-4090: Make code style PSR compliant

-removed all trailing whitespace in forms directory
-replace all tabs with 4 spaces

airtime_mvc/application/forms/StreamSettingSubForm.php

@@ -177,9 +177,9 @@ class Application_Form_StreamSettingSubForm extends Zend_Form_SubForm{
         }
         $user->setAttrib('alt', 'regular_text');
         $this->addElement($user);
-        
+
         $liquidsopa_error_msg = '<div class="stream-status status-info"><h3>Getting information from the server...</h3></div>';
-        
+
         $this->setDecorators(array(
             array('ViewScript', array('viewScript' => 'form/stream-setting-form.phtml', "stream_number"=>$stream_number, "enabled"=>$enable->getValue(), "liquidsoap_error_msg"=>$liquidsopa_error_msg))
         ));