Don't display clarification time from before contest

It looks ugly in some cases and less professional in others where printing
happened much earlier. The exact time is not relevant and could lead to
discussions with teams.

Author: vmcj

webapp/src/Twig/TwigExtension.php

@@ -205,13 +205,16 @@ public function printelapsedminutes(float $start, float $end): string
      * Print a time formatted as specified. The format is according to date().
      * @param Contest|null $contest If given, print time relative to that contest start.
      */
-    public function printtime(string|float|null $datetime, ?string $format = null, ?Contest $contest = null): string
+    public function printtime(string|float|null $datetime, ?string $format = null, ?Contest $contest = null, bool $squash = false): string
     {
         if ($datetime === null) {
             $datetime = Utils::now();
         }
         if ($contest !== null && $this->config->get('show_relative_time')) {
             $relativeTime = $contest->getContestTime((float)$datetime);
+            if ($relativeTime < 0 && $squash) {
+                return "Before contest";
+            }
             $sign         = ($relativeTime < 0 ? -1 : 1);
             $relativeTime *= $sign;
             // We're not showing seconds, while the last minute before

webapp/templates/team/partials/clarification_list.html.twig

@@ -23,7 +23,7 @@
             <tr class="{% if team.unreadClarifications.contains(clarification) %}unseen{% endif %}">
                 <td>
                     <a data-ajax-modal data-ajax-modal-after="markSeen" href="{{ link }}">
-                        {{ clarification.submittime | printtime(null, clarification.contest) }}
+                        {{ clarification.submittime | printtime(null, clarification.contest, true) }}
                     </a>
                 </td>
                 {%- if clarification.sender is null %}