The content and interface language selector is currently available as a beta feature. We need a temporary configuration option to make the new selector available to all users.
The next task after this one will be to enable it on translatewiki.net.
Acceptance criteria:
- Add a new temporary configuration variable, wgULSLanguageSelectorV2Enabled, defaulting to false.
- When wgULSLanguageSelectorV2Enabled is set to true, the new language selector is always loaded in all places where loading it is currently conditional.
- When wgULSLanguageSelectorV2Enabled is set to true, the beta feature is no longer available.
- When wgULSLanguageSelectorV2Enabled is set to false, the beta feature remains available.