XPipe: download ældre versioner

- Fix sudo elevation requiring a different approach on the newly released Ubuntu 25.10 due to sudo being replaced by a rust sudo variant
- Fix host address text field sometimes entering invalid state and not applying hostname changes
- Fix exception when changing synced key scope to per-user
- Fix macOS Tahoe display name containing version twice
- Fix inaccurate error message when a parent of a service did not support tunneling
- Add setting to customize markdown notes template for connections
- Remove confirm dialog when skipping connection validation to allow for faster connection creation