i-plug: student names and emails in the response data of OfferBox pages for companies

On i-plug's OfferBox graduate job service, the response data of a page for client companies included names and emails of students who had not accepted an offer. They were not shown on screen, but could be seen with the browser's developer tools. A client company's question revealed it on 27 August, and the setting was fixed the next day. It had been the case since 12 May, affecting at most 314,009 students in theory. Release checks had covered only what the screen showed, not the data sent.