FIX: InputDeviceTester only shows first touch contact (IXSB-1017)

The logic checking for duplicate "Began" phases with a touch contact was incorrect and has been corrected.

Author: timkeo

ExternalSampleProjects/InputDeviceTester/Assets/InputDeviceTester/Scripts/Input/TouchISX.cs

@@ -84,7 +84,8 @@ private void NewTouchInput(TouchControl control)
         int id = control.touchId.ReadValue();
 
         // Sometimes the Began phase is detected twice. The redundant one needs to be filtered out
-        if (m_HighlightPool.Find(id.ToString()) != null) return;
+        if (m_HighlightPool.Find(id.ToString())?.gameObject?.activeSelf ?? false)
+            return;
 
         Vector2 pos = Camera.main.ScreenToWorldPoint(control.position.ReadValue());