Member expiration datepicker does not work correctly

[vyruz1986]

Describe the bug
When editing a member, and changing the membership expiration date from 1/1/2023 to 1/2/2023, the new date does not get saved to the editable form, while the date picker UI seems to confirm the selection without issues.

Changing the date to e.g. 1/3/2023, then back to 1/2/2023 works fine.

Expected behaviour
The new expiration date should be saved to the input field of the edit member form

[BerendWouters]

I've removed the date mask on the input field in #102, this seems to fix it.

[BerendWouters]

The issue is still there.