WorkRequestDetailView Internals tab: improve UI
@hertzog in !1933 (comment 615394):
- we don't need the subtitles if we already have the titles on the various "dumps", but I would harmonize the titles to always refer explicitly to the field name
 - we probably want to include "task_data", "configured_task_data", "dynamic_data" and "workflow_data" on top of what you already have put
 - maybe "Internals" is also the right place to put a link to the internal collection? (cf #746 (closed))