Fixed of the warnings.

+ Some small bug-fixing related to the system colors change on MacOS ("Set..." buttons didn't respect to the system color change)

src/slic3r/GUI/2DBed.cpp

@@ -14,9 +14,10 @@ namespace GUI {
 Bed_2D::Bed_2D(wxWindow* parent) : 
 wxPanel(parent, wxID_ANY, wxDefaultPosition, wxSize(25 * wxGetApp().em_unit(), -1), wxTAB_TRAVERSAL)
 {
-    SetBackgroundStyle(wxBG_STYLE_PAINT); // to avoid assert message after wxAutoBufferedPaintDC 
 #ifdef __APPLE__
     m_user_drawn_background = false;
+#else
+    SetBackgroundStyle(wxBG_STYLE_PAINT); // to avoid assert message after wxAutoBufferedPaintDC 
 #endif /*__APPLE__*/
 }
 

src/slic3r/GUI/BitmapComboBox.cpp

@@ -267,7 +267,7 @@ void BitmapComboBox::Rescale()
     // we need to refill control with new bitmaps
     const wxString selection = this->GetValue();
     std::vector<wxString> items;
-    for (int i = 0; i < GetCount(); i++)
+    for (size_t i = 0; i < GetCount(); i++)
         items.push_back(GetString(i));
 
     this->Clear();

src/slic3r/GUI/GalleryDialog.cpp

@@ -179,8 +179,8 @@ static void add_lock(wxImage& image)
 
     size_t beg_x = width - lock_width;
     size_t beg_y = height - lock_height;
-    for (size_t x = 0; x < lock_width; ++x) {
+    for (size_t x = 0; x < (size_t)lock_width; ++x) {
-        for (size_t y = 0; y < lock_height; ++y) {
+        for (size_t y = 0; y < (size_t)lock_height; ++y) {
             const size_t lock_idx = (x + y * lock_width);
             if (lock_a_data && lock_a_data[lock_idx] == 0)
                 continue;

src/slic3r/GUI/OptionsGroup.cpp

@@ -747,6 +747,10 @@ void ConfigOptionsGroup::sys_color_changed()
             wxGetApp().UpdateDarkUI(extra_col);
     }
 
+    if (custom_ctrl)
+        wxGetApp().UpdateDarkUI(custom_ctrl);
+#endif
+
     auto update = [](wxSizer* sizer) {
         for (wxSizerItem* item : sizer->GetChildren())
             if (item->IsWindow()) {
@@ -768,10 +772,6 @@ void ConfigOptionsGroup::sys_color_changed()
             update(line.extra_widget_sizer);
     }
 
-    if (custom_ctrl)
-        wxGetApp().UpdateDarkUI(custom_ctrl);
-#endif
-
 	// update undo buttons : rescale bitmaps
 	for (const auto& field : m_fields)
 		field.second->sys_color_changed();

src/slic3r/GUI/Tab.cpp

@@ -709,29 +709,12 @@ void TabPrinter::msw_rescale()
 {
     Tab::msw_rescale();
 
-    // rescale missed options_groups
-    const std::vector<PageShp>& pages = m_printer_technology == ptFFF ? m_pages_sla : m_pages_fff;
-    for (auto page : pages)
-        page->msw_rescale();
-
     if (m_reset_to_filament_color)
         m_reset_to_filament_color->msw_rescale();
 
     Layout();
 }
 
-void TabPrinter::sys_color_changed() 
-{
-    Tab::sys_color_changed();
-
-    // update missed options_groups
-    const std::vector<PageShp>& pages = m_printer_technology == ptFFF ? m_pages_sla : m_pages_fff;
-    for (auto page : pages)
-        page->sys_color_changed();
-
-    Layout();
-}
-
 void TabSLAMaterial::init_options_list()
 {
     if (!m_options_list.empty())

src/slic3r/GUI/Tab.hpp

@@ -485,7 +485,6 @@ public:
 	void		on_preset_loaded() override;
 	void		init_options_list() override;
 	void		msw_rescale() override;
-	void		sys_color_changed() override;
 #if ENABLE_PROJECT_DIRTY_STATE
 	bool 		supports_printer_technology(const PrinterTechnology /* tech */) const override { return true; }
 #else

src/slic3r/GUI/wxExtensions.cpp

@@ -889,6 +889,8 @@ bool ScalableButton::SetBitmap_(const std::string& bmp_name)
     wxBitmap bmp = create_scaled_bitmap(m_current_icon_name, m_parent, m_px_cnt);
     SetBitmap(bmp);
     SetBitmapCurrent(bmp);
+    SetBitmapPressed(bmp);
+    SetBitmapFocus(bmp);
     if (m_use_default_disabled_bitmap)
         SetBitmapDisabled(create_scaled_bitmap(m_current_icon_name, m_parent, m_px_cnt, true));
     return true;
@@ -920,7 +922,11 @@ void ScalableButton::msw_rescale()
     Slic3r::GUI::wxGetApp().UpdateDarkUI(this, m_has_border);
 
     if (!m_current_icon_name.empty()) {
-        SetBitmap(create_scaled_bitmap(m_current_icon_name, m_parent, m_px_cnt));
+        wxBitmap bmp = create_scaled_bitmap(m_current_icon_name, m_parent, m_px_cnt);
+        SetBitmap(bmp);
+        SetBitmapCurrent(bmp);
+        SetBitmapPressed(bmp);
+        SetBitmapFocus(bmp);
         if (!m_disabled_icon_name.empty())
             SetBitmapDisabled(create_scaled_bitmap(m_disabled_icon_name, m_parent, m_px_cnt));
         else if (m_use_default_disabled_bitmap)