Update VE core submodule to master (8a5945c)

New changes:
96331bf Localisation updates from https://translatewiki.net.
ba0ba78 Followup 23a949844: fix typo in class name for WhitespacePreservingInputWidget
8a5945c Have LanguageInputWidget return lang+dir, not an annotation

Change-Id: If05f29a8680e9475e6b749d82db30a20859f1c41
Merge "Update VE core submodule to master (8a5945c)"