I want to add meta fields for the sites in my network (such as a thumbnail and a category). I know how to do this using
update_site_option, but I'm wondering where I could put the UI to manage those meta fields.
The best place would be in the Sites > Infos page, just after the site attributes, but I can't find any hook to hang on. I can add those fields in the "Settings" tab of the same screen, but one has to scroll down a lot to find it, and it gets mixed with advanced settings.
Any suggestion ?