Add 'export to prusa' menu item

An other way to transfert a config to prusa, with the .3mf file.
It's more mandatory now that there is extrusion_spacing

src/libslic3r/Config.cpp

@@ -814,13 +814,21 @@ size_t ConfigBase::load_from_gcode_string(const char* str)
 	return num_key_value_pairs;
 }
 
-void ConfigBase::save(const std::string &file) const
+void ConfigBase::save(const std::string &file, bool to_prusa) const
 {
     boost::nowide::ofstream c;
     c.open(file, std::ios::out | std::ios::trunc);
     c << "# " << Slic3r::header_slic3r_generated() << std::endl;
-    for (const std::string &opt_key : this->keys())
-        c << opt_key << " = " << this->opt_serialize(opt_key) << std::endl;
+    if (to_prusa)
+        for (std::string opt_key : this->keys()) {
+            std::string value = this->opt_serialize(opt_key);
+            this->to_prusa(opt_key, value);
+            if(!opt_key.empty())
+                c << opt_key << " = " << value << std::endl;
+        }
+    else
+        for (const std::string &opt_key : this->keys())
+            c << opt_key << " = " << this->opt_serialize(opt_key) << std::endl;
     c.close();
 }
 

src/libslic3r/Config.hpp

@@ -1923,7 +1923,7 @@ public:
     // Returns number of key/value pairs extracted.
     size_t load_from_gcode_string(const char* str);
     void load(const boost::property_tree::ptree &tree);
-    void save(const std::string &file) const;
+    void save(const std::string &file, bool to_prusa = false) const;
 
 	// Set all the nullable values to nils.
     void null_nullables();

src/slic3r/GUI/MainFrame.cpp

@@ -1260,6 +1260,10 @@ void MainFrame::init_menubar_as_editor()
         append_menu_item(export_menu, wxID_ANY, _L("Export Config Bundle With Physical Printers") + dots, _L("Export all presets including physical printers to file"),
             [this](wxCommandEvent&) { export_configbundle(true); }, "export_config_bundle", nullptr,
             []() {return true; }, this);
+        export_menu->AppendSeparator();
+        append_menu_item(export_menu, wxID_ANY, _L("Export to &Prusa Config") + dots, _L("Export current configuration to file, with only settings compatible with PrusaSlicer"),
+            [this](wxCommandEvent&) { export_config(true); }, "export_config", nullptr,
+            []() {return true; }, this);
         append_submenu(fileMenu, export_menu, wxID_ANY, _L("&Export"), "");
 
 		append_menu_item(fileMenu, wxID_ANY, _L("Ejec&t SD card / Flash drive") + dots + "\tCtrl+T", _L("Eject SD card / Flash drive after the G-code was exported to it."),
@@ -1717,7 +1721,7 @@ void MainFrame::repair_stl()
     Slic3r::GUI::show_info(this, L("Your file was repaired."), L("Repair"));
 }
 
-void MainFrame::export_config()
+void MainFrame::export_config(bool to_prusa)
 {
     // Generate a cummulative configuration for the selected print, filaments and printer.
     auto config = wxGetApp().preset_bundle->full_config();
@@ -1738,7 +1742,7 @@ void MainFrame::export_config()
     if (!file.IsEmpty()) {
         wxGetApp().app_config->update_config_dir(get_dir_name(file));
         m_last_config = file;
-        config.save(file.ToUTF8().data());
+        config.save(file.ToUTF8().data(), to_prusa);
     }
 }
 

src/slic3r/GUI/MainFrame.hpp

@@ -188,7 +188,7 @@ public:
     void        quick_slice(const int qs = qsUndef);
     void        reslice_now();
     void        repair_stl();
-    void        export_config();
+    void        export_config(bool to_prusa = false);
     // Query user for the config file and open it.
     void        load_config_file();
     // Open a config file. Return true if loaded.