Button component is not easy to extend

[cezaraugusto]

trying to apply styled() to buttons is not straight-forward. It should be easy enough to just apply the new styles without worrying about TypeScript definitions or thinking too much.

this needs investigation for details but for now I opened this w/ tracking purposes

[petemill]

@cezaraugusto can you provide an example which requires too much thinking?

[NejcZdovc]

@cezaraugusto I extended button quite easy. I did it like this: https://github.com/brave/brave-ui/blob/master/src/features/rewards/modalAddFunds/style.ts#L88