* Make EventTileViewModel an owned root VM
* Move timestamp sub-VMs under EventTileViewModel
* Move thread-list action bar VM under EventTileViewModel
* Clean up for improved readability
* Clean up to avoid duplicate EventTile render derivations
* Avoid mutating EventTileViewModel during render
* Move EventTile child VM syncing into adapters
* Replace timestamp VM field setters with batched setProps
* Component wrappers at the end of the file
* Lazy-create EventTile child view models