Add-On - SMS Backup & Restore.

10/7/2017

v3.50:
Better handling of network dropout when uploading to Dropbox
Better handling of Wi-Fi dropouts when app is set to upload only on Wi-Fi
Better messaging when upload is skipped due to network restrictions
Better deletion of older files on Dropbox
Better handling of deleted files in Google Drive

New permission for Wi-Fi connection information required to better handle network dropouts.