[Insight] Avoid using deprecated PHP functions

[BugBuster1701]

in classes/BannerHelper.php, line 526

each() has been deprecated in PHP 7.2 and will be removed from PHP in the next major version.

	protected function getRandomBlockerId()
	{
	    $this->getSession('RandomBlocker'.$this->module_id);
	    if ( count($this->_session) )
	    {
	        list($key, $val) = each($this->_session);
	        unset($val);
	        reset($this->_session);
	        return $key;
	    }

Taucht in weiteren Stellen innerhalb der Datei auf und
in public/conban_clicks.php, line 439

[BugBuster1701]

siehe #174 und #175