## What kind of change does this PR introduce?
Bug fix that resolves DEPR-414.
## What is the current behavior?
Browser titles in the table/SQL editors can keep showing an old entity
name after a rename.
## What is the new behavior?
- `EditorBaseLayout` now prefers the live tab label when composing the
browser title entity, so existing stale tab metadata no longer wins.
- Updating a tab label now also syncs the persisted `metadata.name`, so
renamed entities recover cleanly on reload instead of carrying stale
names in local storage.
- Adds a regression test covering the stale-metadata case in the editor
layout.
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
Charis