Update VE core submodule to master (1adc9f5)

New changes:
e02cb87 Fix left-over autoAdd property that didn't get fixed with Idaf3041
74037b0 Split up omnibus CSS files into per-item ones
1adc9f5 Localisation updates from https://translatewiki.net.

Change-Id: I71498cd0b990aebd85dabb68afb3485350b8ac36