Update git submodules
- Update skins/Vector from branch 'REL1_39' to ad5c2460d10ea03f680fc95f1e6a5e6ab93e83b5
- Localisation updates from https://translatewiki.net.
Change-Id: Idfa26f0b40fc117463cd5d23f65587335a7c14b4
- Localisation updates from https://translatewiki.net.