suffixAction() for more form field types.

[dave-mills]

Hi,

I've been exploring adding custom actions to form fields. The suffixAction() (and prefixAction()) works great for TextInput, Select and ColorPicker fields. I think it would be great to also have it for other fields. In my case specifically, It'd be really useful on:

• TextArea
• Checkbox
• CheckboxList
• Radio
• Repeater (maybe?)

I can see that maybe not all of the attributes related to the HasAffixes trait would make sense on all fields (e.g., adding a suffixIcon() to a Repeater field), and probably the ability to do this for Text and Select fields covers 90% of all use cases, but given I've just bumped up against this I thought I'd bring up the idea!

[danharrin]

As long as it doesn't look weird styling wise, feel free to PR

[prykris]

I'm interested in seeing this developed, unable to find time for this myself.