Add plop sound effect for 1st vote if this screen is on

src/states_screens/online/tracks_screen.cpp

@@ -17,6 +17,7 @@
 
 #include "states_screens/online/tracks_screen.hpp"
 
+#include "audio/sfx_manager.hpp"
 #include "challenges/unlock_manager.hpp"
 #include "config/player_manager.hpp"
 #include "config/user_config.hpp"
@@ -665,6 +666,9 @@ void TracksScreen::addVote(uint32_t host_id)
     // Add a new index if this is the first vote for the host/
     if (it == m_index_to_hostid.end())
     {
+        // Sound effect like lobby chat
+        if (GUIEngine::getCurrentScreen() == this)
+            SFXManager::get()->quickSound("plopp");
         m_index_to_hostid.push_back(host_id);
     }
 }   // addVote