Update shadow DOM config setting description

Add missing s in comspec

Update spec for changed config default

⬆️ release-notes@0.43

⬆️ tree-view@0.139.0

For bug fixes

⬆️ scoped-property-store@0.15.3

Revert "Merge pull request atom#4631 from atom/mb-new-config-api"

This reverts commit 5147fb6, reversing
changes made to 9bbbb58.

⬆️ release-notes@0.39

⬆️ language-javascript@0.51

Only respond to stylesheet changes for mounted components

Refs atom#4493