nushell: Nu does not resolve auto-completed files/folders paths with "\", and does not auto-complete paths with "/"

Describe the bug When attempting to open a file in Nu to a valid path using / as a path separator, Nu works as expected. However, tab-based autocomplete of file paths does not work.

When attempting to open a file in Nu to an equally valid path using \ as a separator, Nu’s tab-based autocompletion works as expected. However, attempting to access the file results in the following error:

error: Error opening file: Os { code: 2, kind: NotFound, message: "The system cannot find the file specified." }
  ┌─ shell:1:6
  │
1 │ open ~\.gitconfig
  │      ^^^^^^^^^^^^ Error opening file

To Reproduce Steps listed in the description.

Expected behavior A clear and concise description of what you expected to happen.

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Configuration (please complete the following information):

• Windows 10
• 0.17.0
• Optional features (if any): Stable

Shown on video to @fdncred.