x,y changed to x,y,z, and width,height changed to width,height and depth.

* CurvePath.getPoints() for Arcs resolution should be doubled

- like previous behaviour
- see #9079

* CurvePath: increase resolution of spline curves

* Fix for background clipping when using logarithmicDepthBuffer feature

* Changed subdivisions from 5 to 4

* Whitespace fix

Added the missing core/Layers.js, and removed core/Face4.js, from the canvas.json build include. The canvas only version of three.js now builds properly using the build scripts. (#9251)

# Conflicts:
#	editor/js/libs/app.js