fix: SLIC3R_PCH=OFF now builds on Windows, allowing compiler caching (#15552)

src/slic3r/GUI/DragCanvas.hpp

@@ -3,6 +3,7 @@
 
 #include "wx/bitmap.h"
 #include "wx/dragimag.h"
+#include "wx/panel.h"
 
 namespace Slic3r { namespace GUI {
 

src/slic3r/GUI/GUI_App.cpp

@@ -12,6 +12,7 @@
 #include "BuildCommit.hpp"
 #include "Downloader.hpp"
 #include <boost/chrono/duration.hpp>
+#include <boost/locale/encoding_utf.hpp>
 #include <boost/log/detail/native_typeof.hpp>
 #include <libslic3r/Config.hpp>
 #include <mutex>

src/slic3r/GUI/OptionsGroup.hpp

@@ -199,7 +199,7 @@ public:
 
 	OptionsGroup(wxWindow *_parent, const wxString &title, const wxString &icon, bool is_tab_opt = false,
                     column_t extra_clmn = nullptr);
-	~OptionsGroup() { clear(true); }
+	virtual ~OptionsGroup() { clear(true); }
 
     wxGridSizer*        get_grid_sizer() { return m_grid_sizer; }
 	const std::vector<Line>& get_lines() { return m_lines; }

src/slic3r/GUI/wxMediaCtrl3.h

@@ -8,6 +8,9 @@
 #ifndef wxMediaCtrl3_h
 #define wxMediaCtrl3_h
 
+#include <chrono>
+#include "wx/window.h"
+#include "wx/bitmap.h"
 #include "wx/uri.h"
 #include "wx/mediactrl.h"