Clarify message when no submitted solution was selected

[pdawyndt]

In an evaluation, this is the message you get to see if a student did not submit any solutions before the deadline, but did submit solutions after the deadline (e.g. when student was admitted to work longer than the other students).

The user has 2 attempts for this exercise. [Select another submission.](https://dodona.ugent.be/en/feedbacks/2128419246/edit/)

The word "another" is confusing here, as it suggets that a solution has already been selected (which is not the case). So it should better be replaced to avoid this confusion. Even better, we might also add explicitly that no solution has been selected yet (the empty space where otherwise the solution would be displayed looks a good place to bring this into the attention of reviewers).

[pdawyndt]

After selecting a solution for this student, the submission remains "completed" with a zero score. This is a dangerous situation, because it means that this submission will probably be skipped if the "completed" status and the zero scores are not adjusted at this point. So we should give more attention to this at this point.

(I somewhat recall that this issue was already raised, but I couldn't find it among the open issues)

EDIT: Upon second inspection it seems that the "completed" status is indeed removed (but strong visual clue about this on the page; only icon next to the total score it an indicator of this), but the zero scores remain in place. So, still something that could be improved in my opinion.