Fix editor settings not persisting transparent background type

src/editor/editorguiutils.cpp

@@ -77,3 +77,8 @@ QBrush makeTransparentBackgroundPatternBrush(const TransparentBackgroundPattern
     qWarning() << "unknown TransparentBackgroundPattern::Type" << transparentBackgroundPattern.type;
     return {};
 }
+
+void registerEditorMetatypes()
+{
+    qRegisterMetaType<TransparentBackgroundPattern::Type>();
+}

src/editor/editorguiutils.h

@@ -31,6 +31,8 @@ public:
     constexpr bool operator==(const TransparentBackgroundPattern &other) const = default;
 };
 
+void registerEditorMetatypes();
+
 QBrush makeTransparentBackgroundPatternBrush(const TransparentBackgroundPattern &transparentBackgroundPattern);
 
 void improveButtonBox(QDialogButtonBox *buttonBox);

src/main.cpp

@@ -3,6 +3,7 @@
 #include <QLoggingCategory>
 
 #include "editorsettings.h"
+#include "editorguiutils.h"
 #include "mainwindow.h"
 
 Q_LOGGING_CATEGORY(lcVk, "qt.vulkan")
@@ -27,6 +28,8 @@ int main(int argc, char *argv[])
 
     QApplication app(argc, argv);
 
+    registerEditorMetatypes();
+
     QCoreApplication::setOrganizationDomain("brunner.ninja");
     QCoreApplication::setOrganizationName("brunner.ninja");
     QCoreApplication::setApplicationName("QtGameMaker");