Fix button group breaking (#50064)

* Use Flex instead of Group for items in button

* Allow column picker to stretch to match the height of the element

* Fix height of data picker buttons

* Make sure the whole button is clickable

* Add e2e test for metabase/metabase#50038

* Use correct id for issue in e2e test

Co-authored-by: Kamil Mielnik <kamil@kamilmielnik.com>

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Co-authored-by: Kamil Mielnik <kamil@kamilmielnik.com>