LOG: Recent credentials on dashboard

[lkleisa]

The idea of this feature is to display the recent used credentials on the dashboard

This feature is based on: Access- and changelog conception and the feature #568

Always run the E2E-tests if you change something in the frontend, run the backend-tests if you change something in the backend and test always manually

ToDo

• Fetch the 5 recent activities from current user, you can use PaperTrail::Version.where
• Update dashboard layout with new row "Recent credentials"
• Tests 😁

[renato-oester]

Encryptables are shown on the dashboard, frontend/system specs are provided.
For now all available encryptables are shown, to get most recently used ones the read-access functionality for encryptables needs to be implemented first.