Update git submodules
- Update extensions/WikiEditor from branch 'REL1_40' to 13c7e65db8ecb26f84dab1dcbdcece1191cd9b73
- Localisation updates from https://translatewiki.net.
Change-Id: Ibf5178ba424fd08ff0f2ad3de2d2c1a822c445fe
- Localisation updates from https://translatewiki.net.