Created a tabbed interface for Site Details to switch between showing the site's layouts and the site's pages. In order to do this we've:
+ added a PageLiquid menu in between the SiteDetail and LayoutList blocks on the SiteDetail page
+ created a second SiteDetail page to hold three blocks: SiteDetail, PageLiquid and a new PageList block.
+ created the PageList block to show the Pages associated with a site and it's layouts. Clicking on an item in the grid will take you to that particular page.