feat(InstancePages): save/load wide bar visibility settings

Signed-off-by: flow <flowlnlnln@gmail.com>

launcher/ui/pages/instance/WorldListPage.h

@@ -42,6 +42,8 @@
 #include <Application.h>
 #include <LoggedProcess.h>
 
+#include "settings/Setting.h"
+
 class WorldList;
 namespace Ui
 {
@@ -102,6 +104,8 @@ private:
     unique_qobject_ptr<LoggedProcess> m_mceditProcess;
     bool m_mceditStarting = false;
 
+    std::shared_ptr<Setting> m_wide_bar_setting = nullptr;
+
 private slots:
     void on_actionCopy_Seed_triggered();
     void on_actionMCEdit_triggered();