Update VE core submodule to master (125632e)

New changes:
579a214 Re-label "Clear formatting" to "Clear styling"
494c1cb Prevent iOS Safari from following links
8ba3771 Never embed the context when an inspector is present
5553f56 Localisation updates from https://translatewiki.net.

Change-Id: I748336dc90285c376a8b8ad1ee6c48c94c4cb128