What's Changed

Update installer

• Add an option to switch back to default selections, or use a previous config.
  • In absence of default selections config, users get a chance to reconfigure all together.
  • In absence of previous config, AdGuardHome keeps its current.
• Code improvements.
  • fix shell check arguments; clean up return values.

Full Changelog: https://github.com/jumpsmm7/Asuswrt-Merlin-AdGuardHome-Installer/compare/v1.5.1...master