SelectArrayInput to respect {options: {labelWidth}} and not override it

[wdjunaidi]

Is your feature request related to a problem? Please describe.
SelectArrayInput sometime shows a narrow drop-down which squeeze the label on initial render. Current implementation only adjust the size of the Select based on selection items width on opening up the Select component.

Currently it pass own its own labelWidth prop to the Select component.

Describe the solution you'd like
If {options: {labelWidth}} props is provided, to respect that as the initial labelWidth instead of the calculated one.

Additional context
Alternative solution: It checks the size of the labelText and calculates the labelWidth.