feature(ColorTextBox): Add small size

[misund]

Adds a smaller size to ColorTextBox. That is, if you pass it size="small" it would have smaller paddings

Please tick a box

• feature (A new feature)

If you're adding a feature, is it documented in a storybook story?

• Yes

Are the components you're working on reusable between brands?

• Yes (Using variables that are defined in the default theme)

If you're creating markup, did you add proper semantics?

• Not applicable

(Did you do a CR and see that there is something that we should check for each PR, that are not on the list, please update this document)

[misund]

Ciklum developers are going for a different solution for Aller's video pages.

I will punt this PR to after 0.19.0, and then do some additional testing before merging it in.