Address tech debt: better (more meaningful and human friendly) auto-generated ids.

[ntoll]

Currently DOM ids are something like invent-62h3kdg21k. They could be more meaningful like: invent-button-click-me (taking invent + the component type [button] and a slugged button label [click me]). The heuristics for such names probably live in the class defining the component to be given an ID (i.e. the Button knows how to create human friendly unique button ids).