* Make bucket pickers more customizable

* Allow hiding expressions in `AggregationPicker`

* Migrate `SummarizeSidebar` to MLv2

* Delegate more stuff to aggregation components

* Polish for breakout components

* Don't copy queries into sidebar state

* Use two breakouts in sidebar tests

* Use long display name for pinned breakouts

* Fix "replace column" used instead of "add column"

* Fix extra spacing

* Fix tooltip position

* Fix pinned breakouts display

* Fix E2E test

* Clean up bucket pickers

* Fix types

* Fix border width

* Simplify `BreakoutColumnList`

* Add `withDefaultBucket` helper

* Avoid `byRole` queries in sidebar tests

* Fix UI jumps while searching

* Hide "Custom expression" option