Update VE core submodule to master (69db959)

New changes:
51bd18e Allow the context to close any open inspector
69db959 Update OOjs UI to v0.1.0-pre (c58b498573)

Change-Id: I62d8b4c2ec13022f33667e1050782b76f6d93a76
Merge "Update VE core submodule to master (69db959)"