It was reported at the Open University that there have been some
problems with the formats of files submitted by students. Not all
students completed their outlines as a Word .doc (despite this being the
format of the template provided). Some formats (e.g. .pages) couldn’t be
translated by some of the reviewing students. Therefore, they were
unable to provide a review and the submitting students not receiving any
comments.
This patch allows the teacher to define list of allowed file types that
can be attached to submitted work and/or overall feedback in the
workshop.