Paket doesnt support UWP application

Description

Trying to use Paket with a UWP application. I had previously logged #2465, and the resolution of that allowed the convert-from-nuget command to complete.

However, after the command has completed, when I then try to then build the application, I get this error:

C:\Users\me\Documents\paket-uwp-repro\paket-uwp-repro\paket-uwp-repro.csproj : XamlCompiler error WMC1006: Cannot resolve Assembly or Windows Metadata file 'System.Private.ServiceModel.dll'
1>C:\Program Files (x86)\Microsoft Visual Studio\2017\Professional\MSBuild\Microsoft\WindowsXaml\v15.0\8.2\Microsoft.Windows.UI.Xaml.Common.targets(266,5): Xaml Internal Error error WMC9999: Type universe cannot resolve assembly: System.Private.ServiceModel, Version=4.1.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a.

(Sorry there's such a time delay between these 2 issues - I'm switching between projects)

Repro steps

Create a new blank UWP application in Visual Studio
Add paket
Run paket convert-from-nuget
Try to build application

This can be reproduced with the same Git repo as #2465

Expected behavior

Application has all required dependencies referenced, and builds successfully

Actual behavior

Build error, as above

Known workarounds

None

Reproduce the failure using the linked paket-uwp-repro repository: create the blank UWP application, run paket convert-from-nuget, and build the generated .csproj in Visual Studio. Compare the generated dependency references with the System.Private.ServiceModel error and verify that the application builds successfully without the reported XamlCompiler errors.