Fixed selection of sensible active print / filament / printer profile

after the initial wizard run.

lib/Slic3r/GUI/MainFrame.pm

@@ -723,6 +723,10 @@ sub config_wizard {
             } else {
                 # Wizard returned a name of a preset bundle bundled with the installation. Unpack it.
                 wxTheApp->{preset_bundle}->install_vendor_configbundle($directory . '/' . $result->{preset_name} . '.ini');
+                # Reset the print / filament / printer selections, so that following line will select some sensible defaults.
+                if ($fresh_start) {
+                    wxTheApp->{app_config}->reset_selections;
+                }
                 # Reload all presets after the vendor config bundle has been installed.
                 wxTheApp->{preset_bundle}->load_presets(wxTheApp->{app_config});
             }

xs/src/slic3r/GUI/AppConfig.cpp

@@ -145,6 +145,17 @@ void AppConfig::update_last_output_dir(const std::string &dir)
     this->set("", "last_output_path", dir);
 }
 
+void AppConfig::reset_selections()
+{
+    auto it = m_storage.find("presets");
+    if (it != m_storage.end()) {
+        it->second.erase("print");
+        it->second.erase("filament");
+        it->second.erase("printer");
+        m_dirty = true;
+    }
+}
+
 std::string AppConfig::config_path()
 {
 	return (boost::filesystem::path(Slic3r::data_dir()) / "slic3r.ini").make_preferred().string();

xs/src/slic3r/GUI/AppConfig.hpp

@@ -73,6 +73,11 @@ public:
 	std::string 		get_last_output_dir(const std::string &alt) const;
 	void                update_last_output_dir(const std::string &dir);
 
+	// reset the current print / filament / printer selections, so that 
+	// the  PresetBundle::load_selections(const AppConfig &config) call will select
+	// the first non-default preset when called.
+    void                reset_selections();
+
 	// Get the default config path from Slic3r::data_dir().
 	static std::string  config_path();
 

xs/xsp/GUI_AppConfig.xsp

@@ -41,4 +41,6 @@
     void                        update_skein_dir(char *dir);
     std::string                 get_last_output_dir(const char *alt = "");
     void                        update_last_output_dir(char *dir);
+
+    void                        reset_selections();
 };