Warn user if they schedule an item in the past

[ParetoOptimalDev]

• I have searched for existing issues that may be the same as or related to mine.

Searched "scheduled past“ and none seem relevant.

I think just yellow text of date is in the past would be sufficient.

I once scheduled an appointment the next day 5/24 08:00 the night before for 5/23 08:00 and missed it 🤐