Side-Panel Grouping

Good day everyone. After getting our production DB to work with the new XWiki with Postgres, I am just wondering how do you group all the spaces located in the right-side panel like in the XWiki website, where you can click on a group and the thing collapses or expands. In our case, there is so many spaces that you scroll down and down and it gets pretty irritating after a bit. Any ideas on how to do it? I hope I am clear enough. Thanks Regards, Dandre