Update git submodules
- Update extensions/Echo from branch 'REL1_40' to 841b63fd89cd9bcfa2512eec40476103f8bf8836
- Localisation updates from https://translatewiki.net.
Change-Id: I459b4ef7baf0af83dc8cb50568d276448f3d8b46
- Localisation updates from https://translatewiki.net.