launcher: fix light mode, group settings into resizable sections

src/launcher/include/configurationListWidget.h

@@ -11,6 +11,7 @@
 
 class ConfigurationItem;
 class CompatibilityDatabase;
+class QEvent;
 class QTreeWidgetItem;
 class QPoint;
 class MainDialog;
@@ -52,6 +53,9 @@ signals:
 	void Run();
 	void Select();
 
+protected:
+	void changeEvent(QEvent* event) override;
+
 public slots:
 	void WriteSettings();
 	void ReadSettings();
@@ -74,6 +78,7 @@ private:
 	void               ClearCustomSettings(ConfigurationItem* item);
 	void               SelectItem(QTreeWidgetItem* witem);
 	void               ApplyCompatibility();
+	void               UpdateToolbarIcons();
 	[[nodiscard]] bool HasValidGameDirectory() const;
 
 	ConfigurationItem*            m_selected_item = nullptr;