Add a checkbox for the user to state he doesn't know the acceptance date
Other funder field updates

* Remove the other funder checkbox option
* Always show the other funder input field
* Replace the other funder input field with a textarea
Form addendum changes

* Remove the addendum radio buttons
* Move the addendum information to be displayed after the acceptance date field
Implement form content and copy updates
Remove unused translation keys
Sort the publicationform widget translation keys alphabetically
Fix rendered form values not being encoded for HTML
Fix the journals autocompletion box being cut off