Bug fix: Memory leak when deleting completed background transfers

Source commit: 8759ac8e2303f7cc4ca44e3b983622fe87551214

source/core/Queue.cpp

@@ -882,6 +882,7 @@ bool __fastcall TTerminalQueue::ItemDelete(TQueueItem * Item)
         if (Result)
         {
           FDoneItems->Delete(Index);
+          delete Item;
           UpdateList = true;
         }
       }