Expand All / Collapse All Shortcut for Site Manager Site List

Site Manager currently requires users to manually click the expand arrow on each individual site to view its contents, with no option to open or close all sites at once. This enhancement would add an Expand All and Collapse All shortcut control to the Site Manager interface, allowing all sites in the list to be expanded or collapsed with a single click. Customers managing a large number of sites would benefit from faster navigation and reduced repetitive manual clicking when reviewing the site hierarchy.