Restore deleted flows and folders from Flow Studio Trash

Deleting in Flow Studio now archives instead of erasing. The confirmation counts what goes with a folder, such as 3 folders and 16 flows, and warns that their endpoints stop responding. Open Trash from the flows list to see everything archived in the workspace and restore it in one click for 30 days. A folder comes back with its contents, and each item says whether it returns to its original folder or the top level.