Update AvalonEdit control to show XML syntax for .props file.
Update AvalonEdit control to show XML syntax for .props file.

NuGetPackageExplorer/NuGetPackageExplorer,BreeeZe/NuGetPackageExplorer,campersau/NuGetPackageExplorer,NuGetPackageExplorer/NuGetPackageExplorer,dsplaisted/NuGetPackageExplorer