Implement proper fix for #2776

Doing computeGPRanks in race result screen will make sorting
animation disappear

src/race/race_manager.cpp

@@ -499,6 +499,9 @@ void RaceManager::startNew(bool from_overworld)
             if (next_track < (int)m_tracks.size())
                 m_track_number = next_track;
             m_saved_gp->loadKarts(m_kart_status);
+            // Update the kart GP ranks
+            // This is useful, e.g., when continuing a saved GP, see #2776
+            computeGPRanks();
         }
         else 
         {

src/states_screens/race_result_gui.cpp

@@ -1252,9 +1252,6 @@ void RaceResultGUI::unload()
 #ifndef SERVER_ONLY
         unsigned int num_karts = RaceManager::get()->getNumberOfKarts();
         std::vector<int> old_rank(num_karts, 0);
-        // Update the kart GP ranks
-        // This is useful, e.g., when continuing a saved GP.
-        RaceManager::get()->computeGPRanks();
 
         int time_precision = RaceManager::get()->currentModeTimePrecision();