Refactor and consolidate startup wizard

- Add welcome page
- Add settings migration
- Add library table configuration
- Combine sentry and updates into a privacy step
- Support in single-top mode

pcbnew/python/scripting/pcbnew_scripting_helpers.cpp

@@ -116,7 +116,7 @@ SETTINGS_MANAGER* GetSettingsManager()
         {
             // Ensure wx system settings stuff is available
             ignore_unused( wxTheApp );
-            s_SettingsManager = new SETTINGS_MANAGER( true );
+            s_SettingsManager = new SETTINGS_MANAGER();
         }
     }