Fixing wrong views being made visible when opening all apps

issue: 17422327
Change-Id: I18175ecba154dff3ff5d7e1b16696ca46c7aeae8
diff --git a/src/com/android/launcher3/CellLayout.java b/src/com/android/launcher3/CellLayout.java
index d0b3f43..0ff1ef4 100644
--- a/src/com/android/launcher3/CellLayout.java
+++ b/src/com/android/launcher3/CellLayout.java
@@ -959,10 +959,7 @@
     }
 
     public void setShortcutAndWidgetAlpha(float alpha) {
-        final int childCount = getChildCount();
-        for (int i = 0; i < childCount; i++) {
-            getChildAt(i).setAlpha(alpha);
-        }
+        mShortcutsAndWidgets.setAlpha(alpha);
     }
 
     public ShortcutAndWidgetContainer getShortcutsAndWidgets() {