Cannot display images under WSL2 network location properly

[BLumia]

When try to double-click image under WSL2 network location with path like \\wsl$\Ubuntu\home\username\filename.png, it will says "File is not a valid image".

When passing such path string to QUrl, it will drop the wsl$ hostname since the name is invalid. Unsurprisedly according to microsoft/WSL#4722 and dotnet/runtime#36595 .NET's System.Uri also describing network resource \\wsl$\ is invalid.

According to dotnet/runtime#36595 (comment) the WSL team is considering change of the name (as it violates spec), but before that happend, we can have a workaround fix for that, since wsl$ is still in used now and we don't know when the hostname change will happened and other application like GIMP and also Intellij IDEA can load files under network location like that properly.

[BLumia]

Basic support for WSL2 is now available in 0.3.1, still some known issues.

• No prev and next image for WSL2 location image files. (probably in next release)
• No drag and drop to load WSL2 location image file support. (due to QTBUG-86277, probably won't fix)

[BLumia]

Updates:

• No prev and next image for WSL2 location image files: Should be fixed in e2fb181 in 0.3.2 release.
• No drag and drop to load WSL2 location image file support: See this Qt Gerrit CR CR-314225, should be fixed when building with Qt 5.15.2, related patch removed in 01443d5.