Load views lazy when they are activated

[danielwiehl]

Is your feature request related to a problem? Please describe.

The Workbench creates the views defined in the layout at startup so that the views can set their title and heading dynamically. This causes performance degradation, in particular for iframe-based microfrontend views, because many applications are loaded at the same time.

Describe the solution you'd like

Consider loading views lazy when they are activated, and provide an alternative to dynamically setting the title and heading.