Allow blob URLs/disable when invalid URL

Author: jcansdale

src/GitHub.App/ViewModels/Dialog/Clone/RepositorySelectViewModel.cs

@@ -50,8 +50,7 @@ public RepositorySelectViewModel(IRepositoryCloneService service, IGitHubContext
 
             var filterRepository = this.WhenAnyValue(x => x.Filter)
                 .Select(f => gitHubContextService.FindContextFromUrl(f))
-                .Where(c => c?.LinkType == LinkType.Repository)
-                .Select(c => new RepositoryModel(c.RepositoryName, c.Url));
+                .Select(CreateRepository);
 
             repository = selectedRepository
                 .Merge(filterRepository)
@@ -198,5 +197,17 @@ RepositoryModel CreateRepository(IRepositoryItemViewModel item)
                 new RepositoryModel(item.Name, UriString.ToUriString(item.Url)) :
                 null;
         }
+
+        RepositoryModel CreateRepository(GitHubContext context)
+        {
+            switch (context?.LinkType)
+            {
+                case LinkType.Repository:
+                case LinkType.Blob:
+                    return new RepositoryModel(context.RepositoryName, context.Url);
+            }
+
+            return null;
+        }
     }
 }