Move this function, and the associated constant, to common code.
This required moving wxSpinCtrlDouble::Create() implementation to the
source file, but there are no real changes.
In a native up-down control hexadecimal numbers are always unsigned (see
UDM_SETBASE message documentation) so we need to prevent:
- Setting a range including negative values if base == 16.
- Setting base != 10 if current range includes negative values.
See #18805.
