Improve compression and expansion of the attribute editor.

Currently it is poorly compressed and expands more or less well, since since the components are generating columns randomly, and you can find components with one, two, three, four or more columns depending on the attribute.

I think that configuring three distributions is enough, one basic, one compressed and one expanded. In this way it would be easier to remember and there would be more control over the disposition of the attributes, since they now flow too much.

In the capture I show how to improve compression. Although this is a quick test, I think the improvement is perfectly visible on the right.

It could be the first step to adapt Blender to mobile or tablet.