bugfix: Last active config was lost in Config Panel (fixes #1572)

When loading a config from the GUI, then starting emulation, if we re-opened the GUI the last active config was cleared out.

src/osdep/gui/PanelConfig.cpp

@@ -62,7 +62,6 @@ class ConfigActionListener : public gcn::ActionListener
 			}
 
 			target_cfgfile_load(&changed_prefs, ConfigFilesList[i]->FullPath, CONFIG_TYPE_DEFAULT, 0);
-			strncpy(last_active_config, ConfigFilesList[i]->Name, MAX_DPATH);
 			refresh_all_panels();
 		}
 		else if (actionEvent.getSource() == cmdSave)
@@ -239,12 +238,6 @@ void InitPanelConfig(const struct config_category& category)
 	button_x = category.panel->getWidth() - DISTANCE_BORDER - BUTTON_WIDTH;
 	category.panel->add(cmdDelete, button_x, buttonY);
 
-	if (strlen(last_loaded_config) > 0)
-	{
-		strcpy(last_active_config, last_loaded_config);
-		remove_file_extension(last_active_config);
-	}
-
 	ensureVisible = -1;
 	RefreshPanelConfig();
 }