Reviewed 4 of 4 files at r1, 3 of 3 files at r2, 1 of 1 files at r3.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on @stefano-maggiolo)

cms/server/contest/templates/task_submissions.html, line 290 at r2 (raw file):

<h2 style="margin: 40px 0 10px">{% trans %}Previous submissions{% endtrans %}</h2>

{% if can_use_tokens and actual_phase == 0 %}

Caution, this is not exactly equivalent: before the check passed when some task allowed tokens, now it passes if this task allows tokens. Maybe it's what we want (didn't check), but wanted to flag this.

cms/server/contest/templates/macro/submission.html, line 12 at r1 (raw file):

s_num (int): 1-based position of the submission in the list of
    submissions of the currently logged in participaiton on this task.
show_date (boolean): whether to display only the time or also the date.

s/boolean/bool/?

cms/server/contest/templates/macro/submission.html, line 11 at r2 (raw file):

submissions ([Submission]): all the submissions of the participation on this
    task.
can_use_tokens (boolean): whether tokens are allowed for this task.

s/boolean/bool/?

cms/server/contest/templates/macro/submission.html, line 72 at r3 (raw file):

    </thead>
    <tbody>
    {% set num_displayed = submissions|selectattr("official")|list|length if official else submissions|rejectattr("official")|list|length > 0 %}

Are you sure this works without parentheses? It's not the precedence order in Python:

In [1]: -1 if True else 1 > 0                                                   
Out[1]: -1

In [2]: -1 if False else 1 > 0                                                  
Out[2]: True

Reviewed 2 of 6 files at r5, 2 of 4 files at r6, 1 of 2 files at r7.
Reviewable status: complete! all files reviewed, all discussions resolved