WPMU DEV - Snapshot Pro 4.21.1

• Fix: Re-added change destination directory feature.
• Fix: Minor UI error on dashbord and snapshot progress bar.
• Fix: Minor error on PHP 5.4.

• New: Snapshot now uses V2 of Dropbox API.
• New: Dropbox authentication uses OAuth 2 instead of OAuth 1, fallback system has been created for old destinations.
• Dropbox destination now requires PHP 5.5 or newer.
• Fix: Remove open basedir from Snapshot system check.
• Fix: Fatal error when restoring snapshot on PHP 7.0
• Fix: Remove PHP notice when restoring a Snapshot.
• Fix: AWS Destination not displaying AWS Secret Access Key value.
• Fix: AWS Destination not saving/updating Storage type/File permissions and Directory values.

• New: The Snapshot name is included in the generated archive filename, for easier identification
• New: An error message is displayed if uploading a Snapshot to a remote destination fails
• New: Snapshot filenames are displayed when viewing the Snapshot's information
• New: Display a single Snapshot overview after editing a Snapshot, rather than overview of all Snapshots
• Restored: Snapshots can be created from and restored to a specific subsite on WordPress multisite

• Fix: Minor UI enhancements and fixes
• Fix: Proper JavaScript not being loaded on some pages in the Network Admin
• Fix: Show log button not working when restoring a snapshot
• Fix: Prevent the storage limit for Managed Backups from being set to a negative number, and allow it to be set to 0 for unlimited
• Fix: Add link to the back button on the snapshot restore page
• Fix: Snapshot scheduling information not always saving correctly when editing Snapshot