MAPG-235 timeLimit restored after reload of the page. Time limit selector usability improved

src/PersistentData/Model/UserInChallenge.php

@@ -50,7 +50,7 @@ class UserInChallenge extends Model
     public function setTimeLeft(?int $timeLeft): void
     {
         if(isset($timeLeft)) {
-            $this->timeLeft = $timeLeft;
+            $this->timeLeft = max(0, $timeLeft);
         }
     }