Merge branch 'master' of https://github.com/playcanvas/engine

Fix variable declarations

[FIX] When cloning an Entity with a model component of type asset whi…

…ch has no asset, then clone the model property

Merge branch 'master' of https://github.com/playcanvas/engine

When loading layers from project settings, disable the depth layer be…

…cause it's supposed to be enabled when needed at runtime

[FIX] onEnable not called in depth layer

Update version

Update version

Set sprite to null in sprite animation clip if sprite asset is remove…

…d without checking if asset.resource is the same as the sprite because the asset.resource might already be null

Merge branch 'master' of github.com:playcanvas/engine