Customizable offer expiry date

[Walodja1987]

Context

Allow users to add a custom offer expiry date rather than having to choose from the given options. This is particularly useful when dealing with sports events that start at a specific point in time and you don't want users to fill the offer after the event started.

Mock-ups are provided below in the comments.

Envisaged functionality:

• User can either enter a specific date time, the same way they can do in Expiry Time field including the date time picker option on the right OR
• User can click one of the options below the input field and the date time is calculated as current time + selected period

Note that with that change, the offer expiry is not a duration anymore but an actual date when the offer expires. So might need to adjust the logic a bit in the create flow.

[Ayaz1997]

Mockup with pre-set time selected

Mockup with custom date & time selected

[Walodja1987]

Done in PR #705