Remove "delete from live" duplicate action in favour of existing "unpublish" which is more consistent with current terminology
Add pop-up verification to destructive actions
Fix bug in reporting publishing of error pages
Restoring a page also restores parents
The files are uploaded to transifex.com now, which means we needed
to consolidate the file names (= locales). Since Transifex doesn't allow
arbitrary JavaScript structures, we're using an intermediary JSON
format which gets transformed into the JS used by the framework.
See b59f3858af for generator logic.
Fixes https://github.com/silverstripe/silverstripe-framework/issues/2499