To alter the output (enqueueMessage)

Proposal.
To alter the output of system messages (enqueueMessage).
Principle - the string concatenation, and only after that output.
Why:
The latter conclusion HIKASHOP_SUCC_SAVED / ERROR are overwrite the previous output message(s).
That is, messages MENU_WITHOUT_ASSOCIATED_MODULE and others simply lose their meaning - they are not visible.

eg.
back\classes\menus.php
if($element=='category' && empty($element)){
$app =& JFactory::getApplication();
$app->enqueueMessage(JText::_('MENU_WITHOUT_ASSOCIATED_MODULE'), 'error');
$app->enqueueMessage(JText::_('ASSOCIATED_MODULE_NEEDED'));
$app->enqueueMessage(JText::sprintf('ADD_MODULE_AUTO',hikashop::completeLink('menus&task=add_module&cid='.(int)$module->id.'&'.JUtility::getToken().'=1')));
}
.....
$app->enqueueMessage(JText::_( 'HIKASHOP_SUCC_SAVED' ));

MENU_WITHOUT_ASSOCIATED_MODULE, ASSOCIATED_MODULE_NEEDED, ADD_MODULE_AUTO displayed 0.00001 sec, then HIKASHOP_SUCC_SAVED displayed.

This is understandable

Nothing has changed