Allow a svg icon/ReactNode as dropdownIcon

[MiguelKorn]

I'm submitting a ... (check one with "x")

[ ] bug report
[x] feature request
[ ] support request => Please do not submit support request here, instead see https://forum.primefaces.org/viewforum.php?f=57

Current behavior
For the dropdown component it's currently only possible to give a classname so no option to render custom icons/svg's.

Expected behavior
Allow the dropdownIcon prop to accept a ReactNode or another way to add a custom icon as the dropdown trigger.

[mertsincan]

Hi,

Fixed in #2397

Best Regards,