Remove the embargo functionality

* Remove anything to do with embargoes/sharing the manuscript
* Remove the tracking form widget
* Implement the updated designs for the publication detail page
Remove responsiveness from Definition Lists
Publicationfile widget download button fixes

* Don't show the button when submitting a new manuscript
* Show a 'download' icon next to the button
* Add some extra spacing to the button
* Also allow the content creator to download the submitted manuscript
PR Follow-up