Make PR status visible when GitSccProvider is loaded

Author: jcansdale

src/GitHub.InlineReviews/PullRequestStatusPackage.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
 using Microsoft.VisualStudio.Shell;
-using Microsoft.VisualStudio.Shell.Interop;
 using Microsoft.VisualStudio.ComponentModelHost;
 using GitHub.VisualStudio;
 using GitHub.InlineReviews.Services;
@@ -10,7 +9,7 @@ namespace GitHub.InlineReviews
 {
     [PackageRegistration(UseManagedResourcesOnly = true)]
     [Guid(Guids.PullRequestStatusPackageId)]
-    [ProvideAutoLoad(UIContextGuids80.SolutionExists)]
+    [ProvideAutoLoad(Guids.GitSccProviderId)]
     public class PullRequestStatusPackage : Package
     {
         protected override void Initialize()