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

src/imgui/window/sounds.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "clipboard.h"
+#include "dialog.h"
+#include "manager.h"
+#include "resources.h"
+#include "settings.h"
+
+namespace anm2ed::imgui
+{
+  class Sounds
+  {
+    int newSoundId{-1};
+
+  public:
+    void update(Manager&, Settings&, Resources&, Dialog&, Clipboard&);
+  };
+}