fix(stable): wx 3.3 private Header kopieren + GetToolTipCtrl-Guard

- deps/wxWidgets: copy_private_headers-Step ergänzt (markuptext.h,
  jsscriptwrapper.h etc. fehlen im wx-3.3-cmake-Install)
- GUI_App: wxToolTip::GetToolTipCtrl() ist in wx 3.3 private -> mit
  wxVERSION_NUMBER < 3300 guarden (wie 2.4)

deps/wxWidgets/wxWidgets.cmake

@@ -68,6 +68,28 @@ orcaslicer_add_cmake_project(
         -DwxUSE_EXPAT=sys
 )
 
+# wxWidgets 3.3 cmake install doesn't include private headers.
+# OrcaSlicer uses some of the private headers (markuptext, jsscriptwrapper,
+# accessibility support). Copy the private headers directory after install.
+if(MSVC)
+    set(_wx_inc_dest ${DESTDIR}/include/wx)
+else()
+    set(_wx_inc_dest ${DESTDIR}/include/wx-3.3/wx)
+endif()
+ExternalProject_Add_Step(dep_wxWidgets copy_private_headers
+    DEPENDEES install
+    COMMENT "Copying wxWidgets private headers"
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+        <SOURCE_DIR>/include/wx/private
+        ${_wx_inc_dest}/private
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+        <SOURCE_DIR>/include/wx/generic/private
+        ${_wx_inc_dest}/generic/private
+    COMMAND ${CMAKE_COMMAND} -E copy_directory
+        <SOURCE_DIR>/include/wx/gtk/private
+        ${_wx_inc_dest}/gtk/private
+)
+
 if (MSVC)
     add_debug_dep(dep_wxWidgets)
 endif ()

src/slic3r/GUI/GUI_App.cpp

@@ -4313,8 +4313,11 @@ void GUI_App::force_colors_update()
 #ifdef _MSW_DARK_MODE
 #ifdef __WINDOWS__
     NppDarkMode::SetDarkMode(dark_mode());
+#if wxVERSION_NUMBER < 3300
+    // wxToolTip::GetToolTipCtrl() became private in wxWidgets 3.3.
     if (WXHWND wxHWND = wxToolTip::GetToolTipCtrl())
         NppDarkMode::SetDarkExplorerTheme((HWND)wxHWND);
+#endif
     NppDarkMode::SetDarkTitleBar(mainframe->GetHWND());