Validation check on Contact Us page?
1. Yes, this is a core feature. You can enable it at ACP > Tools & Maintenance > Task Manager > Weekly Backup
2. ACP > Templates & Style > Templates > Find Updated Templates. You can then either revert templates to default or view what's changed to manually apply if you need to keep other modifications to the template.
2. ACP > Templates & Style > Templates > Find Updated Templates. You can then either revert templates to default or view what's changed to manually apply if you need to keep other modifications to the template.