Incorrect link generated for file in submodule

[mrward]

If you open the MonoDevelop solution and then try to use Show in GitHub for a file that is from an submodule the link generated is unable to show the file on GitHub

Example link generated:

https://github.com/mono/monodevelop/blob/nuget-support-v2/main/external/xwt/Xwt/Xwt/Alignment.cs#L32

Correct link:

https://github.com/mono/xwt/blob/master/Xwt/Xwt/Alignment.cs#L32