Restrict hours on calendar (Opening hours)

Rebase done.

Thanks everyone for working or providing your thought on this issue.

I made some minor changes on the MR.

If I could have anyone to test and confirm the last changes to the MR, that would be very helpful.

I will merge it once it is tested and confirmed.

Release with 5.1.9.

Automatically closed - issue fixed for 2 weeks with no activity.