Restoring checks for invalid uwp apps based on PR feedback. This was accidentally removed when moving the initialize outside the constructor.

src/modules/launcher/Plugins/Microsoft.Plugin.Program/Programs/UWP.cs

@@ -69,9 +69,17 @@ namespace Microsoft.Plugin.Program.Programs
                 {
                     var app = new Application(_app, this);
                     apps.Add(app);
-                }
-                
-                Apps = apps.Where(a => a.AppListEntry != "none").ToArray();
+                }
+
+                Apps = apps.Where(a =>
+                {
+                    var valid =
+                    !string.IsNullOrEmpty(a.UserModelId) &&
+                    !string.IsNullOrEmpty(a.DisplayName) &&
+                    a.AppListEntry != "none";
+
+                    return valid;
+                }).ToArray();
             }
             else
             {