Multiview can't open files on Volume:

**Describe the bug** A double-click on a file which sits in the root of a volume (e.g. SYS:, RAM:) fails in Multiview. **To Reproduce** Steps to reproduce the behavior: 1. Create a file in the root of a volume. 2. Icon (#?.info) is not necessary. If an icon is available it must have "sys:utilities/multiview" as tool 3. Double-click it on Wanderer 4. The error message shows a wrong slash in the path (see screenshot) **Expected behaviour** File is opened by Multiview. **Screenshots**  **Architecture** - linux (hosted) **CPU** - x86_64 **Version** Provide the Git ID from AboutAROS (call menu Wanderer>AROS>About) **Additional context** It works if the file is in a subdirectory.