Update git submodules
- Update extensions/Thanks from branch 'REL1_43' to d9f54da5ea3c26147eb524c057dafddb5111bfc7
- Localisation updates from https://translatewiki.net.
Change-Id: Iabd3669bb4e655160fd8f77402f48566c9b77344
- Localisation updates from https://translatewiki.net.