EditorGroupTabBar referenced contextMenu.pinTab/unpinTab (introduced in
5a3a6e2bb) but no locale declared them, so the tab context menu rendered
the raw key path in every language. Rename the unused fixTab/unfixTab
entries to pinTab/unpinTab in all nine locales and add a test asserting
every tab-menu key resolves to text in en (the fallback locale) and that
pin/unpin labels resolve in every locale.
t8y2
392b2bf5b1