Update git submodules
- Update extensions/WikiEditor from branch 'REL1_39' to ee5c58d8e58161452da156b31dec3a831c86c24b
- Localisation updates from https://translatewiki.net.
Change-Id: I2b7024cba9cc765b3aed524880d039b4c7cc455d
- Localisation updates from https://translatewiki.net.