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

src/imgui/window/spritesheets.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "clipboard.h"
+#include "dialog.h"
+#include "manager.h"
+#include "resources.h"
+#include "settings.h"
+
+namespace anm2ed::imgui
+{
+  class Spritesheets
+  {
+    int newSpritesheetId{-1};
+    PopupHelper mergePopup{PopupHelper(LABEL_SPRITESHEETS_MERGE_POPUP, imgui::POPUP_SMALL_NO_HEIGHT)};
+    PopupHelper packPopup{PopupHelper(LABEL_SPRITESHEETS_PACK_POPUP, imgui::POPUP_SMALL_NO_HEIGHT)};
+    PopupHelper overwritePopup{PopupHelper(LABEL_TASKBAR_OVERWRITE_FILE, imgui::POPUP_SMALL_NO_HEIGHT)};
+    std::set<int> mergeSelection{};
+    int packId{-1};
+    std::set<int> saveSelection{};
+
+  public:
+    void update(Manager&, Settings&, Resources&, Dialog&, Clipboard& clipboard);
+  };
+}