ui: dynamically generate lists of entities

[aspiers]

Description

Currently the Home component has hardcoded ids for a few entities. We need to dynamically generate lists of organisations, people, offices etc. by querying the API, and then hyperlinking the results to the corresponding bubble charts.

Comments, Questions and Considerations

These lists should probably be either dropdowns or paginated lists. Either way ideally we would have AJAX substring filtering for quick discovery of a given entity.

Acceptance Criteria

This story can be considered done when the following acceptance tests
are satisfied:

Given a populated backend

When I visit the UI home page

Then I can easily find any organisation or office or person and navigate to the bubble chart for that entity.