Allow TimePicker to utilize custom placeholders.

[LaExploradora]

Hello everyone!

First of all, I'm terribly sorry if I'm in the wrong place to discuss such a thing.

What's bugging me is the inability to use custom time placeholders in the <TimePicker /> component.

This should be rather easy to implement, since it would require a tiny change to the <SpinInput /> component, which <TimePicker /> utilizes. The default placeholder value could stay the same (--), while the users would be able to change it without jumping through the CSS hoops.

I'd like to take this upon myself if the feature is a go by other maintainers and developers.

Thanks and have a good day!

[rtivital]

You are welcome to submit a PR with this feature

[LaExploradora]

You are welcome to submit a PR with this feature

Thanks for such a quick reply!

Submitted a PR - #8387