feature<Welcome>: 现在拖动目录到打开记录中后会直接打开仓库，而不是仅仅更新打开记录

src/Views/Widgets/Welcome.xaml.cs

@@ -230,6 +230,7 @@ namespace SourceGit.Views.Widgets {
                     if (dir != null) {
                         var root = new Commands.GetRepositoryRootPath(path).Result();
                         Models.Preference.Instance.AddRepository(root, dir, parent);
+                        CheckAndOpen(path);
                         rebuild = true;
                     }
                 }