Fix issue where extra page hangs around (issue 11634172)

Change-Id: Ia0900c9fc07bc587259e36ed17816eaf519b10dc
diff --git a/src/com/android/launcher3/Folder.java b/src/com/android/launcher3/Folder.java
index bd61010..f26d01f 100644
--- a/src/com/android/launcher3/Folder.java
+++ b/src/com/android/launcher3/Folder.java
@@ -758,6 +758,8 @@
                 }
                 completeDragExit();
             }
+        } else {
+            mLauncher.getWorkspace().removeExtraEmptyScreen(true, null);
         }
 
         mDeleteFolderOnDropCompleted = false;