WPMU DEV - Snapshot Pro 4.21.1

- Feature: Configs
- Bug: IP check before running a backup temporarily disabled
- Improvement: Ability to go to previous step after authorizing Google Drive
- Improvement: Academy links removed
- Improvement: Global Exclusions shortcut links

- Feature: Dropbox Destination
- Improvement: Check if IPs are whitelisted before running a backup
- Improvement: "Test Connection" button on destination edit modals

- Feature: Backup comments
- Bug: Save Changes button doesn't save storage limit
- Bug: Only one destination is displayed under "Last backup destination"
- Bug: Pressing Esc doesn't close modals
- Improvement: DB level dynamic scaling
- Improvement: Increase file listing success rate
- Improvement: Compatibility with the WP Hide & Security Enhancer plugin
- Improvement: Option to clear all global file exclusions at once
- Improvement: "Load more" button for large log files
- Improvement: Troubleshooting message with IPs to be whitelisted when backup can't start