Updated mediawiki/extensions
Project: mediawiki/extensions/ThemeDesigner  8581a8521cbc61ec996dc6b7766a55878c58c8d8

Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: Ib9e013a58c2849b8c421e2b1e9e3c3faf5d32ad2