fix: show unique workspaces in sidebar

(cherry picked from commit 7331e3a7be)

frappe/public/js/frappe/views/workspace/workspace.js

@@ -117,6 +117,7 @@ frappe.views.Workspace = class Workspace {
 					(page) => page.parent_page == "" || page.parent_page == null
 				);
 			}
+			root_pages = root_pages.uniqBy((d) => d.title);
 			this.build_sidebar_section(category, root_pages);
 		});