Use unique_ptr on all ui objects from .ui files (#5511)

* Forward declare ui and use unique_ptr

* ConfigureEnhancements: use unique_ptr for ui

* Use make_unique instead of new where applicable

* Move some of the ui includes that already used unique_ptr

* main.cpp: also make use of make_unique on Config

* Address review comments

src/citra_qt/multiplayer/lobby.cpp

@@ -18,6 +18,7 @@
 #include "core/hle/service/cfg/cfg.h"
 #include "core/settings.h"
 #include "network/network.h"
+#include "ui_lobby.h"
 #ifdef ENABLE_WEB_SERVICE
 #include "web_service/web_backend.h"
 #endif
@@ -81,6 +82,8 @@ Lobby::Lobby(QWidget* parent, QStandardItemModel* list,
     RefreshLobby();
 }
 
+Lobby::~Lobby() = default;
+
 void Lobby::UpdateGameList(QStandardItemModel* list) {
     game_list->clear();
     for (int i = 0; i < list->rowCount(); i++) {

src/citra_qt/multiplayer/lobby.h

@@ -13,7 +13,10 @@
 #include "common/announce_multiplayer_room.h"
 #include "core/announce_multiplayer_session.h"
 #include "network/network.h"
-#include "ui_lobby.h"
+
+namespace Ui {
+class Lobby;
+}
 
 class LobbyModel;
 class LobbyFilterProxyModel;
@@ -28,7 +31,7 @@ class Lobby : public QDialog {
 public:
     explicit Lobby(QWidget* parent, QStandardItemModel* list,
                    std::shared_ptr<Core::AnnounceMultiplayerSession> session);
-    ~Lobby() = default;
+    ~Lobby() override;
 
     /**
      * Updates the lobby with a new game list model.