Fix ResettableTextField size prop can't be overridden

[WiXSL]

Fixes #9546

[PedroPerpetua]

This doesn't fix #9546 - the Textfield size should be moved to the themeing, not props; in fact, you can already override it with props - this PR effectively does nothing.

[fzaninotto]

@WiXSL The author of the issue has also opened a PR to fix it (see #9546). Both your PRs are identical, so it's hard to choose the keeper. For this time, we'll keep the other one and close yours, but it's nothing personal, we still love your contributions!

[WiXSL]

That's great!
The important thing is to maintain the project stable for everyone, I don't mind If are PR's made by me or not, haha