Focus first focusable element when opening a view

[danielwiehl]

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

When opening a view, the first focusable element should be focused by default, unless the view sets the focus itself.

Describe the solution you'd like

When opening a view, the first focusable element is focused.

Scope

Focusing the first focusable element should work in both the workbench and microfrontend views.