How to create read-only dashboard or restrict actions by some conditions

Created by: rozhok

Hello!

Is there option to disable links to create/update/delete? For instance, I have list of Orders, and some of them are not editable after completion. I'd like to make them read-only not by introducing some logic into controller/model, but also by disabling corresponding buttons in the administrate.

I a nutshell, I'd like to see following options:

1. Completely disable create/update/delete (in any combination) for certain dashboards
2. Disable some actions per model by some logic

Thanks!