Update git submodules
- Update skins/Timeless from branch 'REL1_42' to 5c73a0bd528362f5bfb5a9c7640785615b26d07d
- Localisation updates from https://translatewiki.net.
Change-Id: I392c3c2a2b1e06f5b41103d55d1e1cdb893740da
- Localisation updates from https://translatewiki.net.