Editor: Added @drewnoakes dragover handling. Seesms like droping wasn't working on some setups. See #3035.

Also moved some more ui.js styles to the app's css.

This gave me a hard time in a presentation where I was embeding the editor in one of the slides and it was stealing the focus...

This got broken after GeometryLoader got removed, using instead JSONLoader.

Ok, lets go with blue.

Still not happy about it, need more time to see what the right style for all this is.

For the moment using just fixed predefined tessellations. I wonder what UI would be good for choosing this.

Todo: better naming scheme for newly created objects.

Default scene on the initialization is now created via resetScene action, in the same way like via menubar.

Now it should look the same no matter where the object is located.

Also fixed spotlights shading in Lambert material and light helpers init colors for light intensities > 1.

Please disregard init scene lighting weirdness, this is just temporary, to be able to test light helpers.

Ugh! And there I was thinking that UI.Color had a bug.

Not there yet completely, some things are still broken and code is pretty horrible but at least something starts to work.

And menubar hover thingies are back ;)

See discussion in https://github.com/alteredq/three.js/commit/fe902e553f5e30e3752398ad1588bcc4ea1f5513

That was a bit tricky - because Viewport was created before Sidebar.Outliner, cameraChanged signal wasn't effectively setting activeCamera in Outliner (which is how it is passed to SceneExporter).

Changing order of these UI element creations though started to (correctly) highlight Viewport, and as this is controlled via pseudo CSS :focus class, it can't be easily overridden from JavaScript. We should really start to use CSS.

Not sure if helpers should be fogged or not. It does look pretty weird when they are not fogged. Also having helpers fogged helps to get a sense of the fog effect over larger space.

Maybe there could be a checkbox for enabling this, to be able to see things if they need to be modified while in the fog.

Also found and fixed a bug deep in WebGLRenderer, where shaders were not recompiled when changing fog types because fog type wasn't taken into account when creating shader code hash. Phew, that was a tough one to figure out. This Editor thingie really forces us to dust all nooks and cranies of the codebase ;)

For the moment just clear color is plugged in.