Consider removing less pre-processing entirely.

[metasansana]

The pre-processing was introduced to allow class names to be defined in js and re-used in less so we only have one location to update them. This can be ideal but having to create a js variable just to add a style only used rule is tedious.

We should remove the need for this for modifiers first at least. Repeating the names in JS should not be too much of an inconvenience.