[Feature] Allow Timezone select options to be customized

Environment

• Package version(s): 5.x
• Browser and OS versions:

Feature request

Suggest the ability to allow a custom list of options to be provided to the Timezone select component.

Examples

As an example, there is currently an option for America/Mexico_City for the CST time zone, but there isn't an option that also covers CDT, e.g. America/Chicago. Rather than trying to find a one-size-fits-all solution, allowing the list to be tailored would be a more flexible approach to meet different use-case scenarios.