Added a delete page with options to delete the local database, as well as the remote files.
Added a captcha to protect against automated attacks that would attempt to delete the remote files.
This fixes#1201
Implemented better output for Restore.
Fixed a problem with errors during dispose, and a problem with selecting filesets that do not exist.
Fixed a bug with restore if a file existed with some correct data, a copy would be restored with partial data.
Added check to try to avoid excessive restores of the same files if a file in another version already exists.