Adlai Holler c62a4d3e79 [ASCollectionView] Greatly Improve Cell Node Resizing (#1853) ...

* [ASCollectionView] Initial pass at reducing double-sided animations

* [ASCollectionView] Always suppress animation during node size requery

* [ASCollectionView] Rejigger the invalidation logic to support animated size changes

* [ASCollectionView] Remove unused header

* [ASCollectionView] Change comment

* [ASDataController] Remove unused variable

* [ASCollectionView] When relayout animated due to cell size change, wait until next layout pass

* [ASCollectionView] Invalidate layout synchronously

* [ASCollectionView] Only read the layout object once

* [ASCollectionView] When size changes, wait for requery before layout

* [ASCollectionView] Sort of go back to using an empty update to handle node resizing

* [ASCollectionView] Remove unused constant

* [ASCollectionView] Address PR comments

* [ASCollectionView] Prevent nested [super performBatchUpdates:] calls

2016-07-06 14:13:52 -07:00

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