making X on carousel a little larger

Hi!

I’ve brought up the issue here:

https://github.com/Automattic/jetpack/pull/798

Thanks for bringing our attention to it again!

ok thanks! it is a minor thing really, but i would say, it should be just a little bit bigger, maybe by another third of the size. ?? just for dumb dumbs who dont know they can click on the white bit, lol.