Keyboard navigation outside enabled dates

[AlexM-Val]

There are couple issues with keyboard navigation, when there are disabled days in the calendar.

• it loses focus if going into disabled days.
• if continuing arrow navigating over disabled days it jumps into the disabled month. From there the arrow keyboard navigation is no longer working.

see this sandbox: https://codesandbox.io/s/sandpack-project-forked-i07lee?file=/App.tsx
If one selects the 3rd of January 2015 and then left arrow 3 times it will jump into the disabled month. From there the arrow keyboard navigation is no longer working.

There is an issue raised here: #1320.

Any ideas for a workaround, please?