Calendar: Focus is lost when navigating between views

[simeonoff]

Description

Focus is lost when using the keyboard to navigate between the year/month views.

Steps to reproduce

1. Open the calendar story
2. Using the Tab key, navigate to either the "Month" (ex. November) or the "Year" (ex. 2023) in the navigation area.
3. Press the Enter key.

Result

When the active view changes, the current/active month/year is not focuses so choosing the month/year cannot be completed from there on.

Expected result

When views are changed the current/active month/year should be selected.