Place bottom scripts before the closing body tag

We used to place them after the closing body tag. Both work in practice, but being within the body follows the HTML spec.
Processes: add scope and XForms actions
Persistence proxy: close stream, rename, add comments
fr:alert-dialog: support xxforms-dialog-open
xxf:show/xxf:hide: don't restrict to xxf:dialog
Fix test after 55a54ae882a24ce2531361036eaa78404dd58992
i18n: translated controls into italian and german