UI - Expand Validation for Minimum Booking Days

From QA on Parent Story:
**TEST ENV**
Alignment - It's off by 1 px:

Min. Booking days:
Currently accepts negative numbers

Min. booking days will accept an impressive amount of numbers:

Min. Booking days will even accept an astronomical amount of numbers:

Since this is only internal, would it worth to limit the number @saragunnarsson @dimak1 ?

No file or test is named. Start at the UI field for minimum booking days and inspect its validation and alignment. Done means negative and excessively large values are handled according to an agreed limit, and the reported 1px alignment issue is corrected.

Written by the indexing model from the issue text.