Fixed bugs from SPE-180

xs/src/libslic3r/PrintConfig.cpp

@@ -1041,7 +1041,7 @@ PrintConfigDef::PrintConfigDef()
     def->multiline = true;
     def->full_width = true;
 	def->height = 60;
-	def->default_value = new ConfigOptionStrings{ "" };
+	def->default_value = new ConfigOptionStrings();
 
     def = this->add("printer_model", coString);
     def->label = L("Printer type");

xs/src/slic3r/GUI/Field.cpp

@@ -404,6 +404,7 @@ void Choice::set_value(boost::any value, bool change_event)
 	case coInt:
 	case coFloat:
 	case coPercent:
+	case coString:
 	case coStrings:{
 		wxString text_value;
 		if (m_opt.type == coInt) 
@@ -417,7 +418,6 @@ void Choice::set_value(boost::any value, bool change_event)
 				break;
 			++idx;
 		}
-//		if (m_opt.type == coPercent) text_value += "%";
 		idx == m_opt.enum_values.size() ?
 			dynamic_cast<wxComboBox*>(window)->SetValue(text_value) :
 			dynamic_cast<wxComboBox*>(window)->SetSelection(idx);
@@ -446,6 +446,7 @@ void Choice::set_values(const std::vector<std::string> values)
 	auto ww = dynamic_cast<wxComboBox*>(window);
 	auto value = ww->GetValue();
 	ww->Clear();
+	ww->Append("");
 	for (auto el : values)
 		ww->Append(wxString(el));
 	ww->SetValue(value);

xs/src/slic3r/GUI/OptionsGroup.cpp

@@ -406,8 +406,9 @@ boost::any ConfigOptionsGroup::get_config_value(const DynamicPrintConfig& config
 			ret = text_value;
 		else if (opt->gui_flags.compare("serialized") == 0){
 			std::vector<std::string> values = config.option<ConfigOptionStrings>(opt_key)->values;
-			for (auto el : values)
+			if (!values.empty() && values[0].compare("") != 0)
-				text_value += el + ";";
+				for (auto el : values)
+					text_value += el + ";";
 			ret = text_value;
 		}
 		else

xs/src/slic3r/GUI/Preset.cpp

@@ -584,14 +584,6 @@ std::vector<std::string>    PresetCollection::system_equal_options() const
 	std::vector<std::string> equal;
 	if (edited != nullptr && reference != nullptr) {
 		equal = reference->config.equal(edited->config);
-		// The "compatible_printers" option key is handled differently from the others:
-		// It is not mandatory. If the key is missing, it means it is compatible with any printer.
-		// If the key exists and it is empty, it means it is compatible with no printer.
-		std::initializer_list<const char*> optional_keys{ "compatible_printers", "compatible_printers_condition" };
-		for (auto &opt_key : optional_keys) {
-			if (reference->config.has(opt_key) == edited->config.has(opt_key))
-				equal.emplace_back(opt_key);
-		}
 	}
 	return equal;
 }

xs/src/slic3r/GUI/Tab.cpp

@@ -225,11 +225,6 @@ void Tab::update_changed_ui()
 		m_sys_options.resize(0);
 		const auto sys_preset = m_presets->get_selected_preset_parent();
 		if (sys_preset){
-			std::initializer_list<const char*> optional_keys{"compatible_printers", "compatible_printers_condition" };
-			for (auto &opt_key : optional_keys) {
-				if (m_config->has(opt_key) == sys_preset->config.has(opt_key))
-					m_sys_options.emplace_back(opt_key);
-			}
 			for (auto opt_key : m_config->keys())
 			{
 				if (opt_key == "bed_shape"){ m_sys_options.emplace_back(opt_key);		continue; }
@@ -241,7 +236,13 @@ void Tab::update_changed_ui()
 				case coStrings:	add_correct_opts_to_sys_options<ConfigOptionStrings	>(opt_key, &m_sys_options, tab);	break;
 				case coPercents:add_correct_opts_to_sys_options<ConfigOptionPercents>(opt_key, &m_sys_options, tab);	break;
 				case coPoints:	add_correct_opts_to_sys_options<ConfigOptionPoints	>(opt_key, &m_sys_options, tab);	break;
-				default:		m_sys_options.emplace_back(opt_key);		break;
+				default:{
+					const ConfigOption *opt_cur = tab->m_config->option(opt_key);
+					const ConfigOption *opt_sys = sys_preset->config.option(opt_key);
+					if (opt_cur != nullptr && opt_sys != nullptr && *opt_cur == *opt_sys)
+						m_sys_options.emplace_back(opt_key);		
+					break;
+				}
 				}
 			}
 
@@ -358,12 +359,6 @@ void Tab::update_full_options_list()
 		}
 	}
 	m_full_options_list.emplace_back("extruders_count");
-
-	std::initializer_list<const char*> optional_keys{ "compatible_printers", "compatible_printers_condition" };
-	for (auto &opt_key : optional_keys) {
-		if (m_config->has(opt_key))
-			m_full_options_list.emplace_back(opt_key);
-	}
 }
 
 void Tab::update_sys_ui_after_sel_preset()