Coalesce has the correct return type of `T[]`. Filter may return `(T | undefined)[]`

fixing simple cases of any[]

* Added a new enum for setting types
* Added separate `Delayer` with a long debounce for non-text inputs

* Simplify and fix bugs in no results/result count message logic

* Put count render logic behind debouncer

* formatting

* remove log

Fix #50652 - fix exact setting key search for ui editor. Also fix "new extension" button blinking at the top during search

And some other fixes