XWIKI-8605: Editing a document in french, or other language provided as translation, doesn't use the provided sheet
* The sheet is not applied for new translations because EditAction doesn't mark them with setTranslation(1).
* Copy the title from the default translation to the new translation and set the default locale of the new translation.
* New translations edited in inline mode are not saved correctly because editinline.vm doesn't submit the right language.