Update git submodules
- Update extensions/CodeEditor from branch 'REL1_39' to 2589a281761924d238342fb4a6452ca3f3892e57
- Localisation updates from https://translatewiki.net.
Change-Id: I7e0ffaec60013ff8dd39ade883f2ba5ad17a9815
- Localisation updates from https://translatewiki.net.