staging some future refactoring, .h -> hpp, fix for rendering w/ audio

src/imgui/wizard/change_all_frame_properties.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "document.h"
+#include "settings.h"
+
+namespace anm2ed::imgui::wizard
+{
+  class ChangeAllFrameProperties
+  {
+  public:
+    bool isChanged{};
+
+    void update(Document&, Settings&);
+  };
+}