Possibility to add html iframes

Hi Mahamadou, on the dashboard view, if you add a note and add some HTML in it, it can be an iframe.(watch out that iframes might be block, there is an option though to solve this see https://forum.glpi-project.org/viewtopic.php?id=159668) ; I think you need to comment or uncomment a line 

header('x-frame-options:SAMEORIGIN');