debug: smarter scope id computation so expansion state is more preserved. Also if all collapsed, expand first non expensive scope

fixes #93230

[themes] Icon theme is wiped out from settings.json when running vscode with --disable-extensions. Fixes #93157

use `path.win32.*` and `fsPath` when dealing with file-uris on windows, https://github.com/microsoft/vscode/issues/90208

Co-Authored-By: NBenjamin Pasero <benjpas@microsoft.com>

Fix history entries navigation taking extra navigates in debug console

Call it `joinPath`, add tests, don't reuse the implemention from resources.ts, https://github.com/microsoft/vscode/issues/90208

fixes #89080