Change the favicon.svg

Hi,

What config do I update to change the top icon from a favicon.svg to favicon.png? I have created a custom Theme and its working,

I am using Owncloud lastest version 10.0.8 on Ubuntu 16.*

This looks to me like the same question asked in a second thread? https://central.owncloud.org/t/change-favicon-svg-to-favicon-png/13485