NEW: Official filament color selection approved

- Add a filament picker dialog for official color selection
- Enable displaying multiple filament colors in the picker dialog and preview sidebar
- Introduce two new config options:
  - `filament_multi_colors`
  - `filament_color_types`
  to both the application config and the 3MF config

jira: STUDIO-12346

Change-Id: I66f8c1ec9147df4f5948c8a329c1737551280e63
(cherry picked from commit 522dc0bbca49033a1ba9725ca7f6c3ea729691a6)

src/slic3r/GUI/PresetComboBoxes.hpp

@@ -11,6 +11,7 @@
 #include "BitmapComboBox.hpp"
 #include "Widgets/ComboBox.hpp"
 #include "GUI_Utils.hpp"
+#include "EncodedFilament.hpp"
 
 class wxString;
 class wxTextCtrl;
@@ -205,6 +206,10 @@ public:
     void OnSelect(wxCommandEvent& evt) override;
     void update_badge_according_flag();
 
+    FilamentColor get_cur_color_info();
+    void show_default_color_picker();
+    void sync_colour_config(const std::vector<std::string> &clrs, bool is_gradient);
+
 private:
     // BBS
     wxColor m_color;