Update VE core submodule to master (32397d8)

New changes:
5e60f12 Ensure clipboard key is removed from paste target
32397d8 Update OOjs UI to v0.4.0

Local changes to compensate for new OOUI version, and updated wfUseMW call.

Change-Id: I005f7b23a36e04f1305d4aa037c19a5c7db9a699