fix: WorldFactInteraction now uses CanvasGoup alpha instead of Image alpha

CanvasGroup alpha also affects child GameObjects alpha, whereas Image alpha only affects the Image itself

Assets/Scripts/InteractionEngine/WorldFactInteraction.cs

@@ -20,7 +20,7 @@ void LateUpdate()
         if (currentDisplay != null && currentDisplay.GetComponent<DragHandling>().dragged)
         {
             // currently dragging -> remove transparency to indicate dragging and let DragHandling.cs take over
-            ChangeImageAlpha(currentDisplay.GetComponent<Image>(), 1);
+            currentDisplay.GetComponent<CanvasGroup>().alpha = 1;
             return;
         }
 
@@ -56,7 +56,7 @@ private void UpdateDisplay()
         }
 
         currentDisplay.transform.position = Input.mousePosition; // move currentDisplay to mousePosition
-        ChangeImageAlpha(currentDisplay.GetComponent<Image>(), 0.5f); // ensure that image alpha is correct, since it could have changed due to dragging
+        currentDisplay.GetComponent<CanvasGroup>().alpha = 0.5f; // ensure that image alpha is correct, since it could have changed due to dragging
 
         lastHit = hit.transform;
     }
@@ -71,11 +71,6 @@ private void InstantiateNewDisplay(FactObject factObj)
     }
 
     #region Helper
-    private static void ChangeImageAlpha(Image img, float alpha)
-    {
-        img.color = new Color(img.color.r, img.color.g, img.color.b, alpha);
-    }
-
     /// <summary>
     /// Returns true if any UI other than currentDisplay was hit
     /// </summary>