Snapshots extended to capture and restore sla_print, sla_material,

physical_printers.
Updated the snapshots dialog to display sla_print and sla_material.
Updated the snapshots dialog to display physical_printer instead of
printer if the physical_printer key is nonempty.
The "physical_printer" key was moved from [extras] to [presets] section
of PrusaSlicer.ini

src/libslic3r/AppConfig.cpp

@@ -205,6 +205,20 @@ std::string AppConfig::load()
         m_legacy_datadir = ini_ver < Semver(1, 40, 0);
     }
 
+    // Legacy conversion
+    if (m_mode == EAppMode::Editor) {
+        // Convert [extras] "physical_printer" to [presets] "physical_printer",
+        // remove the [extras] section if it becomes empty.
+        if (auto it_section = m_storage.find("extras"); it_section != m_storage.end()) {
+            if (auto it_physical_printer = it_section->second.find("physical_printer"); it_physical_printer != it_section->second.end()) {
+                m_storage["presets"]["physical_printer"] = it_physical_printer->second;
+                it_section->second.erase(it_physical_printer);
+            }
+            if (it_section->second.empty())
+                m_storage.erase(it_section);
+        }
+    }
+
     // Override missing or keys with their defaults.
     this->set_defaults();
     m_dirty = false;
@@ -428,6 +442,7 @@ void AppConfig::reset_selections()
         it->second.erase("sla_print");
         it->second.erase("sla_material");
         it->second.erase("printer");
+        it->second.erase("physical_printer");
         m_dirty = true;
     }
 }

src/libslic3r/AppConfig.hpp

@@ -142,20 +142,20 @@ public:
 #endif // ENABLE_GCODE_VIEWER
 
 	// Returns true if the user's data directory comes from before Slic3r 1.40.0 (no updating)
-	bool legacy_datadir() const { return m_legacy_datadir; }
-	void set_legacy_datadir(bool value) { m_legacy_datadir = value; }
+	bool 				legacy_datadir() const { return m_legacy_datadir; }
+	void 				set_legacy_datadir(bool value) { m_legacy_datadir = value; }
 
 	// Get the Slic3r version check url.
 	// This returns a hardcoded string unless it is overriden by "version_check_url" in the ini file.
-	std::string version_check_url() const;
+	std::string 		version_check_url() const;
 
 	// Returns the original Slic3r version found in the ini file before it was overwritten
 	// by the current version
-	Semver orig_version() const { return m_orig_version; }
+	Semver 				orig_version() const { return m_orig_version; }
 
 	// Does the config file exist?
 #if ENABLE_GCODE_VIEWER
-	bool 		exists();
+	bool 				exists();
 #else
 	static bool 		exists();
 #endif // ENABLE_GCODE_VIEWER

src/libslic3r/PresetBundle.cpp

@@ -458,7 +458,7 @@ void PresetBundle::load_selections(AppConfig &config, const std::string &preferr
     this->update_multi_material_filament_presets();
 
     // Parse the initial physical printer name.
-    std::string initial_physical_printer_name = remove_ini_suffix(config.get("extras", "physical_printer"));
+    std::string initial_physical_printer_name = remove_ini_suffix(config.get("presets", "physical_printer"));
 
     // Activate physical printer from the config
     if (!initial_physical_printer_name.empty())
@@ -482,8 +482,7 @@ void PresetBundle::export_selections(AppConfig &config)
     config.set("presets", "sla_print",    sla_prints.get_selected_preset_name());
     config.set("presets", "sla_material", sla_materials.get_selected_preset_name());
     config.set("presets", "printer",      printers.get_selected_preset_name());
-
-    config.set("extras", "physical_printer", physical_printers.get_selected_full_printer_name());
+    config.set("presets", "physical_printer", physical_printers.get_selected_full_printer_name());
 }
 
 DynamicPrintConfig PresetBundle::full_config() const