When adding a subtree limitation to a role using the "Users and Groups" tab under a role, an invalid subtree path is created missing a trailing /.

Steps to reproduce:

• Goto Roles in the admin ui.
• Click "Editor" under the name column.
• Select the "Users and Groups using the <Editor> role" tab
• "Assign to users/groups with subtree limitation"
• Select subtree and confirm selection.
• Select "Editors" user group and confirm selection.
• ( due to cache, Navigate to "Admin/roles" navigation item and back to "Users and Groups using the <Editor> role" tab.)

You will see a new limitation beside editors "Subtree( /1/2 )" that is missing the trailing slash. Which will throw exceptions in the Subtree criterion constructor.

Video: https://youtu.be/gNcmraYiKf4