Structure: Reorganize component+state

Increasingly, components have state in the Redux store that belongs to them. So this kind of state should live with the component instead of in a separate state folder.

Each state-based component should have all code for it in one place.

Start by inventorying the state-based components and the separate state folder, then trace which Redux-store state belongs to each component. Done means each state-based component has all of its code in one place, with no component-owned state left separated without a stated reason.

Written by the indexing model from the issue text.