Fix player list not showing in lobby. Fix host and direct connect crashing citra

src/citra_qt/multiplayer/direct_connect.h

@@ -7,13 +7,18 @@
 #include <memory>
 #include <QDialog>
 #include <QFutureWatcher>
-#include "ui_direct_connect.h"
+#include "citra_qt/multiplayer/validation.h"
+
+namespace Ui {
+class DirectConnect;
+}
 
 class DirectConnectWindow : public QDialog {
     Q_OBJECT
 
 public:
     explicit DirectConnectWindow(QWidget* parent = nullptr);
+    ~DirectConnectWindow();
 
 signals:
     /**
@@ -32,4 +37,5 @@ private:
 
     QFutureWatcher<void>* watcher;
     std::unique_ptr<Ui::DirectConnect> ui;
+    Validation validation;
 };