MBS Filemaker Plugin, version 2.9pr7

New in this prerelease of the 2.9 plugins:

Added WebView.SetCustomUserAgent and WebView.GetCustomUserAgent functions.
Added functions for container value encryption: Encryption.EncryptContainerBlowfish, Encryption.DecryptContainerBlowfish, Encryption.EncryptContainerAES and Encryption.DecryptContainerAES.
Added more LibXL functions.
Fixed CURL to reset input file pointer when uploading same file data to multiple locations.
Fixed crash when disabling the MBS Filemaker Plugin in Filemaker Preferences.
Fixed FileDialogWatcher.Install so you can't install it several times.
Added parameter to WebView.Reload to force reload.
Fixed Windows clipboard functions. Sometimes they had extra characters at the end of the text.