Code improvement: list displays

[gklyne]

• [x] move invocation of authentication to the immediate response handler code?
• [x] refactor list description access out of context handling code (avoid multiple reads)
• [x] refactor code from entityeditbase into more specific views where possible
• [x] rename what is left of entityeditbase -> entityviewbase, or move to generic module
• [ ] use proper indexing to accelerate search. (ElasticSearch or Jena?)