Thank you, that seems to have done the trick! Much appreciated.
However, such a pain sorry, the custom icons I added do not seem to be showing up now? I added roughly 10 fontawesome icons (fa fa-headphones etc) to the PHP file, which show up properly when selecting icons for iconboxs, but are not showing up on the actual webpage anymore.
Probably got the code wrong, but any help would make my day!
Thank you very much.