Make the opening of files deterministic #474
Description
Say that we are dragging & dropping files A, B, and C then OpenCOR may open them in the B, A, C order, depending on how long it takes to load each file. In other words, another time, it might be the order we are after, i.e. A, B, C, but another time it might be C, A, B. So, we need to ensure that the order is always the same.