Fix issue with fragment as well as query

Author: markcowl

src/Accounts/Accounts/CommonModule/EnvironmentExtensions.cs

@@ -238,7 +238,7 @@ internal static Uri PatchHost(this Uri baseUri, string newBase)
             {
                 output.Path = output.Uri.AppendPathRemoveDuplicates(baseUri.AbsolutePath);
                 output.Query = baseUri.Query?.TrimStart('?');
-                output.Fragment = baseUri.Fragment;
+                output.Fragment = baseUri.Fragment?.TrimStart('#');
                 return output.Uri;
             }