wslview: opens powershell windows when opening file in GUI application launched from the Start Menu

[lucyllewy]

Background Information:

• Build: 21343
• WSL: Ubuntu on WSL Community Preview
• Version: v3.2.1-1

Describe the bug When running a GUI application from the Windows Start Menu that tries to open a wslview-supported file in Windows there are multiple powershell windows that open. These should ideally be eliminated or hidden.

To Reproduce Steps to reproduce the behavior:

1. Install Windows Insider build 21332 or later
2. Install Ubuntu on WSL Community Preview
3. Install nautilus: sudo apt install -yqq nautilus
4. Open nautilus by selecting "Files" from the Windows Start Menu
5. Navigate to a PDF file in nautilus and double-click to open it

Expected behavior Silently launch the file in the correct Windows application, without popping up any intermediary powershell windows.

[patrick330602]

This should be fixed in 4.0.0