[InputGroup] Add default paddingRight to input without rightElement

[alxmiron]

Hello team!
Just noticed a small issue with text input groups. As I understand, CSS component TextInput should display same as default InputGroup JS component.
However, TextInput has padding-right: 12px, but InputGroup (withou rightElement) has padding-right: 0 (inline style rule).

CSS:

JS:

I guess InputGroup also should have padding-right.
The problem reason is here

[cmslewis]

The InputGroup isn't actually a 1:1 mapping to .pt-input, but we do have an issue open to make that a thing for 2.0, at least as far as naming goes. This is a good thing to track together with that. 👍

[llorca]

yup, also this issue may help with styling inconsistencies #1425

[nickensoul]

@cmslewis @llorca can you approve this changes has been delivered into release?
Looks like on the 3rd version there is no change about paddings and still adds inline padding.
It's just a bad way to stylish via inline styles, maybe add className tot the input that reflects right icon existence?

[adidahiya]

@nickensoul this is an old issue, please open a new one if you wish to file a bug