Add language filtering UI to search (#5459)
* Use new TextField for search bar
* Add lang dropdown
* Dialog
* Revert "Dialog"
This reverts commit 257573cd9c2a70d29df4ef5bdd503eea4ae411fe.
* Extract util, test, cleanup
* Fix formatting
* Pass through other params
* Fix sticky header
* Fix stale data, hide/show
* Improve query parsing
* Replace memo
* Couple tweaks
* Revert cancel change
* Remove unused placeholder
authored by