Split mac UI state saving

src/platform_apple/apple_platform_services.cpp

@@ -169,4 +169,11 @@ void AppleDocumentPlatformServices::set_cursor_visible(bool visible) const
 #endif
 }
 
+void AppleDocumentPlatformServices::save_ui_state() const
+{
+#if defined(__OSX__)
+    [App::I->osx_app save_ui_state];
+#endif
+}
+
 }

src/platform_apple/apple_platform_services.h

@@ -38,6 +38,7 @@ public:
     void display_file(std::string_view path) const;
     void share_file(std::string_view path) const;
     void set_cursor_visible(bool visible) const;
+    void save_ui_state() const;
 
 private:
     PlatformFamily family_;

src/platform_legacy/legacy_platform_services.cpp

@@ -451,9 +451,7 @@ public:
     {
         if (!pp::platform::platform_saves_native_ui_state(pp::platform::current_platform_family()))
             return;
-#ifdef __OSX__
-        [App::I->osx_app save_ui_state];
-#endif
+        active_apple_document_platform_services().save_ui_state();
     }
 
     [[nodiscard]] bool enables_live_asset_reloading() override