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

Avoid repeating types and mark fields as readonly

Fixes #64633

Fixes #64631

Make sure we don't try making requests against TS for files that are not currently open

* schedule update overflow action due to reflow
fixes #64514

* removed disposal

Fixes #64576

We compute the style of an element to access its left padding. However this value is only used when `horizontalScrolling` is enabled.

With this change,  we only compute the style when `horizontalScrolling` is true

Fix #64379 - SimpleFindWidget position was changed (in hidden state)

Set default terminal buffer impl to TypedArray

Add a null check for initialCwd

Convert backup tpromise.join to promise.all

add allow/disallow tasks

Part of #64598